Patch merged into coreboot/master: buildgcc: Always set HOSTCFLAGS

the following patch was just integrated into master:
commit 5f72f960dfd13d2a7ade670650c54be48fb2b017
Author: Nico Huber 
Date:   Sun Jan 31 23:05:19 2016 +0100

buildgcc: Always set HOSTCFLAGS

Always set HOSTCFLAGS to the flags GMP was built with, defaulting to
    "-Os" if it isn't built yet. Previously, if GMP was already built or
    not even in the list of packages to be built, this was silently skipped
    and other packages were built with empty HOSTCFLAGS.

Change-Id: I29b2ea75283410a6cea60dc1c92b87573aebfb34
    Signed-off-by: Nico Huber 
    Reviewed-on: https://review.coreboot.org/13550
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/13550 for details.

-gerrit