gcc-common.inc: Process staging fixme with correct target/native sysroot
Correct the 'staging_processfixme' call so that target sysroot and
native sysroot paths are corrected when extracting the stashed build
directory. This is required for 'make check' to work correctly due paths
used in configuration and scripts which point at the native sysroot.
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
