* eval.c (evaluate_subexp_standard) [OP_OBJC_MSGCALL]: Support

	* eval.c (evaluate_subexp_standard) [OP_OBJC_MSGCALL]: Support
	platforms that use function descriptors.  Prefer to use function
	pointer types instead of function types.
	* linespec.c (decode_objc): Support function descriptors.  Fully
	initialize SAL result.
	* objc-lang.c (find_methods): Support function descriptors.
	Do not require function symbol to point to text section.

	* ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): When calling
	via a function pointer, use the descriptor it points to.