gnu: gd: fix deplibs check method for mips64.

* gnu/packages/patches/gd-mips64-deplibs-fix.patch: New file.
* gnu/packages/gd.scm (gd): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu: libmad: Fix MIPS assembler code to work with new GCC.

* gnu/packages/patches/libmad-mips-newgcc.patch: New file.
* gnu/packages/mp3.scm (libmad): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu: libtheora: patch ancient config.guess to support mips64.

* gnu/packages/patches/libtheora-config-guess.patch: New file.
* gnu/packages/oggvorbis.scm (libtheora): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu: alsa-lib: fix atomic op declarations for MIPS.

* gnu/packages/patches/alsa-lib-mips-atomic-fix.patch: New file.
* gnu/packages/linux.scm (alsa-lib): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

gnu: gdb: patch-makefile-SHELL for all Makefile.in files.

* gnu/packages/gdb.scm (gdb): patch-makefile-SHELL for all Makefile.in files
  after configure.

gnu: gdb: Fix opcode table for Loongson fused multiply-add.

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

gnu: libffi: fix handling of uint32_t arguments on MIPS N32.

* gnu/packages/patches/libffi-mips-n32-fix.patch: New file.
* gnu/packages/libffi.scm (libffi): Add patch.
* gnu-system.am (dist_patch_DATA): Add patch.

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.

union: Do not warn when identical files collide.

* guix/build/union.scm (file=?): New procedure.
  (union-build)[resolve-collision]: Do not warn when identical files
  collide.

gnu: Add bridge-utils.

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