re PR bootstrap/38607 (AIX error messages about TOC during build)

        PR target/38607
        Merge upstream change.
        * libtool.m4 (_LT_COMPILER_PIC): Add -fPIC to GCC and GXX for AIX.

	* configure.ac: Add target-libquadmath to noconfigdirs for AIX.
        Add libgomp*.o to compare_exclusions for AIX.
        * configure: Regenerate.

From-SVN: r191316