libsanitizer: Add AM_CCASFLAGS to Makefile.am

libsanitizer: Add AM_CCASFLAGS to Makefile.am

commit 9069eb28d45baaa8baf5e3790b03b0e2cc5b49b3
Author: Igor Tsimbalist <igor.v.tsimbalist@intel.com>
Date:   Fri Nov 17 22:34:50 2017 +0100

    Enable building libsanitizer with Intel CET

    libsanitizer/
            * acinclude.m4: Add enable.m4 and cet.m4.
            * Makefile.in: Regenerate.
            * asan/Makefile.am: Update AM_CXXFLAGS.
            * asan/Makefile.in: Regenerate.
            * configure: Likewise.
            * configure.ac: Set CET_FLAGS. Update EXTRA_CFLAGS,
            EXTRA_CXXFLAGS, EXTRA_ASFLAGS.
            * interception/Makefile.am: Update AM_CXXFLAGS.
            * interception/Makefile.in: Regenerate.
            * libbacktrace/Makefile.am: Update AM_CFLAGS, AM_CXXFLAGS.
            * libbacktrace/Makefile.in: Regenerate.
            * lsan/Makefile.am: Update AM_CXXFLAGS.
            * lsan/Makefile.in: Regenerate.
            * sanitizer_common/Makefile.am: Update AM_CXXFLAGS,
            AM_CCASFLAGS.
            * sanitizer_common/sanitizer_linux_x86_64.S: Include cet.h.
            Add _CET_ENDBR macro.
            * sanitizer_common/Makefile.in: Regenerate.
            * tsan/Makefile.am: Update AM_CXXFLAGS.
            * tsan/Makefile.in: Regenerate.
            * tsan/tsan_rtl_amd64.S Include cet.h. Add _CET_ENDBR macro.
            * ubsan/Makefile.am: Update AM_CXXFLAGS.
            * ubsan/Makefile.in: Regenerate.

failed to add EXTRA_ASFLAGS to AM_CCASFLAGS in all Makefile.am.  As
the result, CET aren't enabled in all assembly codes.

Add AM_CCASFLAGS to Makefile.am to compile assembly codes with $CET_FLAGS.

	PR sanitizer/102632
	* asan/Makefile.am (AM_CCASFLAGS): New.  Set to $(EXTRA_ASFLAGS).
	* hwasan/Makefile.am (AM_CCASFLAGS): Likewise.
	* interception/Makefile.am (AM_CCASFLAGS): Likewise.
	* lsan/Makefile.am (AM_CCASFLAGS): Likewise.
	* tsan/Makefile.am (AM_CCASFLAGS): Likewise.
	* ubsan/Makefile.am (AM_CCASFLAGS): Likewise.
	* asan/Makefile.in: Regenerate.
	* hwasan/Makefile.in: Likewise.
	* interception/Makefile.in: Likewise.
	* lsan/Makefile.in: Likewise.
	* tsan/Makefile.in: Likewise.
	* ubsan/Makefile.in: Likewise.