target.def (TARGET_HAS_IFUNC_P): New target hook.

        * gcc/target.def (TARGET_HAS_IFUNC_P): New target hook.
        * gcc/doc/tm.texi.in (TARGET_HAS_IFUNC_P): New.
        * gcc/doc/tm.texi: Regenerate.
        * gcc/targhooks.h (default_has_ifunc_p): New.
        * gcc/targhooks.c (default_has_ifunc_p): Ditto.
        * gcc/config/linux-protos.h: New file.
        * gcc/config/linux-android.h (TARGET_HAS_IFUNC_P): Using version of
        this hook for linux which disables support of indirect functions in
        android.
        * gcc/config/linux-android.c: New file.
        * gcc/config/t-linux-android.c: Ditto.
        * gcc/config.gcc: Added new object file linux-android.o.
        * gcc/config/i386/i386.c (ix86_get_function_versions_dispatcher):
        Using TARGET_HAS_IFUNC hook instead of HAVE_GNU_INDIRECT_FUNCTION.
        * gcc/varasm.c (do_assemble_alias): Likewise.
        * configure.ac: Define HAVE_GNU_INDIRECT_FUNCTION as zero if the target
        doesn't support indirect functions.
        * configure: Regenerate.

From-SVN: r197156