gcc-cross: Avoid races with gcc_stash_builddir

Its sad we need to do this but do_install and do_populate_sysroot appear
to change the files in ${B} and this breaks if something works in parallel
like gcc_stash_builddir. We've seen a few too many race errors on the
autobuilder which appear to be from this so make things run in sequence
deterministically for now.

An example failure was this from do_populate_sysroot whilst stash_builddir was running
in parallel:

ERROR: gcc-cross-initial-arm-6.3.0-r0 do_populate_sysroot: split_and_strip_files: 'file
/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm-lsb/build/build/tmp/work/x86_64-linux/
gcc-cross-initial-arm/6.3.0-r0/sysroot-destdir/home/pokybuild/yocto-autobuilder/yocto-worker/
nightly-arm-lsb/build/build/tmp/work/x86_64-linux/gcc-cross-initial-arm/6.3.0-r0/recipe-sysroot-native/
usr/bin/arm-poky-linux-gnueabi.gcc-cross-initial-arm/arm-poky-linux-gnueabi-gcov' failed

Exception: subprocess.CalledProcessError: Command '('patchelf-uninative', '--set-interpreter',
'/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm-lsb/build/build/tmp/sysroots-uninative/
x86_64-linux/lib/ld-linux-x86-64.so.2', '/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm-lsb/
build/build/tmp/work/x86_64-linux/gcc-cross-initial-arm/6.3.0-r0/sstate-build-populate_sysroot/
recipe-sysroot-native/usr/bin/arm-poky-linux-gnueabi.gcc-cross-initial-arm/arm-poky-linux-gnueabi-gcov')' returned non-zero exit status 1

Subprocess output:
missing section headers

(From OE-Core rev: 75b76eb08c7e344142f0326605aeb6b24e61e38e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions