gnu: libtool: skip a test that fails on MIPS N32.

* gnu/packages/patches/libtool-skip-tests-for-mips.patch: New file.
* gnu/packages/autotools.scm (libtool): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu: binutils: apply fixes and workarounds for Loongson 2F CPUs.

* gnu/packages/patches/binutils-loongson-madd-fix.patch: New file.
* gnu/packages/patches/binutils-loongson-workaround.patch: New file.
* gnu/packages/base.scm (binutils): Add patches.
* gnu-system.am (dist_patch_DATA): Add patches.

gnu: make-bootstrap: Build libc and Guile without a .gnu_debuglink.

* gnu/packages/make-bootstrap.scm (glibc-for-bootstrap, %guile-static):
  Add 'outputs' field.

gnu: make-bootstrap: Allow bit-reproducibility for 'glibc-stripped'.

* gnu/packages/make-bootstrap.scm (%glibc-stripped): Remove '.install'
  and '..install.cmd' files.

gnu: make-bootstrap: Add C++ header files to the bootstrap GCC.

* gnu/packages/make-bootstrap.scm (%gcc-stripped): Add $gcc/include/c++.

gnu: cross-gcc: Fix build of 'gcc-cross-sans-libc'.

* gnu/packages/cross-base.scm (cross-gcc): Add "--disable-libatomic".

gnu: Revert to GCC 4.7 as the default compiler.

GCC 4.8 relies on C++ headers (<cstring>, <iosfwd>, etc.) that are
missing from the current bootstrap GCC.

* gnu/packages/base.scm (gcc-boot0, cross-gcc-wrapper, gcc-final): Base
  on GCC-4.7.  This reverts part of commit 9ae7cee.

gnu: Switch to GCC 4.8 as the default compiler.

* gnu/packages/base.scm (gcc-boot0, cross-gcc-wrapper, gcc-final): Base
  on GCC-4.8.
* gnu/packages/cross-base.scm (cross-gcc): Likewise.
* gnu/packages/make-bootstrap.scm (package-with-relocatable-glibc,
  %gcc-static, %gcc-stripped): Likewise.

gnu: grep: Update to 2.15.

* gnu/packages/base.scm (grep): Update to 2.15.

Merge branch 'master' into core-updates

gnu: pulseaudio: increase timeout of thread test.

* gnu/packages/patches/pulseaudio-test-timeouts.patch: New file.
* gnu/packages/pulseaudio.scm (pulseaudio): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu: Add bridge-utils.

* gnu/packages/linux.scm (bridge-utils): New variable.

gnu: libmicrohttpd: Update to 0.9.31.

* gnu/packages/gnunet.scm (libmicrohttpd): Update to 0.9.31,
    synchronise the description with GNU SRC.

gnu: Add gst-plugins-base-0.10.

* gnu/packages/gstreamer.scm (gst-plugins-base-0.10): New variable.

gnu: gstreamer-0.10: Propagate input libxml2.

* gnu/packages/gstreamer.scm (gstreamer-0.10): Propagate input libxml2.

gnu: Add gstreamer-0.10.

* gnu/packages/gstreamer.scm (gstreamer-0.10): New variable.
* gnu/packages/patches/gstreamer-0.10-bison3.patch,
  gnu/packages/patches/gstreamer-0.10-silly-test.patch: New files.
* gnu-system.am (dist_patch_DATA): Add patches.

gnu: mit-krb5: Update to 1.11.3.

* gnu/packages/mit-krb5.scm (mit-krb5): Update to 1.11.3.

gnu: Add python2-empy.

* gnu/packages/python.scm (python2-empy): New variable.

gnu: gcc-4.8: Upgrade to 4.8.2.

* gnu/packages/gcc.scm (gcc-4.8): Upgrade to 4.8.2.

gnu: mesa: Update URI.

* gnu/packages/xorg.scm (mesa): Update URI.