distro: make: Change default shell from /bin/sh to the actual shell.

* distro/packages/base.scm (gnu-make): Add `set-default-shell' phase.
  (gnu-make-boot0): Adjust phases accordingly.

build-system/gnu: Change the order of `patch-source-shebangs' and `patch'.

* guix/build/gnu-build-system.scm (patch-source-shebangs): Add a newline
  after the "SHELL =" line in po/Makefile.in.in.
  (%standard-phases): Move `patch-source-shebangs' after `patch'.

distro: Linux-Libre: Set $ARCH based on the actual system type.

* distro/packages/linux.scm (linux-libre-headers): Set $ARCH based on
  the `system' keyword argument.

distro: guile: Switch to 2.0.7.

* distro/packages/guile.scm (guile-2.0/fixed): Alias GUILE-2.0.

build-system/gnu: Patch shebangs in executable source files.

This allows many packages to build in a chroot that lacks /bin and
thus /bin/sh.

* guix/build/gnu-build-system.scm (patch-source-shebangs): New
  procedure.
  (%standard-phases): Add it.
* guix/build/utils.scm (executable-file?): New procedure.
* distro/packages/perl.scm (perl): Don't use /bin/sh to run `Configure'.

build-system/gnu: Make the error port line-buffered.

* guix/build/gnu-build-system.scm (gnu-build): Make the error port
  line-buffered.

utils: Make the buffer size of `dump-port' a parameter.

* guix/build/utils.scm (dump-port): Make `buffer-size' a keyword
  parameter.

Merge branch 'master' into core-updates

Conflicts:
	distro/packages/multiprecision.scm

guix-build: Add `--verbosity'.

* guix-build.in (%default-options): Add `verbosity'.
  (%options): Add `--verbosity'.
  (guix-build): Pass it to `set-build-options'.
  (show-help): Update accordingly.
* doc/guix.texi (Invoking guix-build): Document `--verbosity'.

daemon: Add `--debug' option.

* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_DEBUG): New macro.
  (options): Add `--debug'.
  (parse_opt): Set `verbosity' upon GUIX_OPT_DEBUG.

daemon: Disable use of substitutes for now.

* nix/nix-daemon/guix-daemon.cc (main): Set `settings.useSubstitutes' to
  false, and `settings.substituters' to the empty list.

distro: Use (guix licenses) instead of strings.

* distro/packages/acl.scm, distro/packages/attr.scm,
  distro/packages/autotools.scm, distro/packages/base.scm,
  distro/packages/bash.scm, distro/packages/bdw-gc.scm,
  distro/packages/bison.scm, distro/packages/bootstrap.scm,
  distro/packages/compression.scm, distro/packages/cpio.scm,
  distro/packages/ddrescue.scm, distro/packages/ed.scm,
  distro/packages/flex.scm, distro/packages/gawk.scm,
  distro/packages/gdbm.scm, distro/packages/gettext.scm,
  distro/packages/gnupg.scm, distro/packages/gnutls.scm,
  distro/packages/gperf.scm, distro/packages/guile.scm,
  distro/packages/help2man.scm, distro/packages/less.scm,
  distro/packages/libffi.scm, distro/packages/libsigsegv.scm,
  distro/packages/libunistring.scm, distro/packages/linux.scm,
  distro/packages/lout.scm, distro/packages/lsh.scm,
  distro/packages/m4.scm, distro/packages/multiprecision.scm,
  distro/packages/nano.scm, distro/packages/ncurses.scm,
  distro/packages/nettle.scm, distro/packages/perl.scm,
  distro/packages/pkg-config.scm, distro/packages/pth.scm,
  distro/packages/readline.scm, distro/packages/recutils.scm,
  distro/packages/shishi.scm, distro/packages/system.scm,
  distro/packages/texinfo.scm, distro/packages/time.scm,
  distro/packages/wget.scm, distro/packages/which.scm,
  distro/packages/zile.scm: Use (guix licenses).

build: Avoid brace expansion in `nix/sync-with-upstream'.

* nix/sync-with-upstream: Avoid brace expansion, for the sake of Dash.

daemon: Build `nix-setuid-helper'.

* daemon.am (libexec_PROGRAMS, nix_setuid_helper_SOURCES,
  nix_setuid_helper_CPPFLAGS, nix_setuid_helper_LDADD): New variables.
* test-env.in: Set and export `NIX_SETUID_HELPER'.
* README (Installing Guix as non-root): New section.

download: Work around (web client) bug <http://bugs.gnu.org/13095>.

* guix/build/download.scm: Annihilate `shutdown' in (web client).

distro: Fix incorrect "bash" input for gcc-boot0-wrapped.

* distro/packages/base.scm (gcc-boot0-wrapped): Fix incorrect "bash" input.

release.nix: Remove trailing "/nix" from localstatedir.

* release.nix (tarball, build): Use /nix/var as localstatedir, as a
  follow-up to 7f4f065.

build: Fix default value of `%state-directory'.

* guix/config.scm.in (%state-directory): Append `/nix'.
  Reported by Andreas Enge <andreas@enge.fr>.

build: Have `bootstrap' run all the necessary steps.

* bootstrap: Always run "git submodule init".  Run
  `nix/sync-with-upstream'.
  Reported by Nikita Karetnikov and Andreas Enge.

build-system/gnu: Avoid using /bin/sh.

* guix/build/gnu-build-system.scm (configure): Add `inputs' keyword
  parameter.  Take Bash from there, falling back to /bin/sh.  Set
  `CONFIG_SHELL' and `SHELL' to that Bash.  Run "bash ./configure"
  instead of just "./configure".
* distro/packages/bootstrap.scm (%bootstrap-inputs): Add "bash".
* distro/packages/base.scm (gcc-boot0-wrapped): Use "bash" from
  %BOOT1-INPUTS instead of /bin/sh.