Added fnspec to internal functions.

Added fnspec to internal functions.

2014-08-11  Yury Gribov  <y.gribov@samsung.com>

gcc/
        * gimple.c (gimple_call_fnspec): Support internal functions.
        (gimple_call_return_flags): Use const.
        * Makefile.in (GTFILES): Add internal-fn.h to list of GC files.
        * internal-fn.def: Add fnspec information.
        * internal-fn.h (internal_fn_fnspec): New function.
        (init_internal_fns): Declare new function.
        * internal-fn.c (internal_fn_fnspec_array): New global variable.
        (init_internal_fns): New function.
        * tree-core.h: Update macro call.
        * tree.c (build_common_builtin_nodes): Initialize internal fns.

From-SVN: r213806