* Makefile.in (fixinc.sh): Pass BUILD_LIBERTY as LIBERTY to
mkfixinc.sh.
* fixinc/mkfixinc.sh (defs): Add LIBERTY.
* configure.in (STMP_FIXINC, STMP_FIXPROTO): Don't disable on
build != host sysrooted builds.
* configure.in (SYSTEM_HEADER_DIR): Make sure it contains
TARGET_SYSTEM_ROOT even on sysrooted natives.
* configure: Rebuilt.

From-SVN: r65462