builtins.def (BUILT_IN_LABS, [...]): Don't define.

builtins.def (BUILT_IN_LABS, [...]): Don't define.

	* builtins.def (BUILT_IN_LABS, BUILT_IN_LLABS, BUILT_IN_IMAXABS):
	Don't define.
	* builtins.c (expand_builtin): Don't handle BUILT_IN_LABS,
	BUILT_IN_LLABS and BUILT_IN_IMAXABS.
	* c-common.c (c_common_nodes_and_builtins): Use BUILT_IN_ABS for
	builtin labs, llabs and imaxabs.
	(expand_tree_builtin): Don't handle BUILT_IN_LABS, BUILT_IN_LLABS
	and BUILT_IN_IMAXABS.

From-SVN: r38475