* builtins.def (BUILT_IN_IMAXABS): Add.

	* builtins.def (BUILT_IN_IMAXABS): Add.
	* builtins.c (expand_builtin): Also abort on BUILT_IN_IMAXABS.
	* c-common.c (c_common_nodes_and_builtins): Create builtin
	functions __builtin_imaxabs, and plain imaxabs unless
	flag_no_nonansi_builtin outside C99 mode.
	(expand_tree_builtin): Handle BUILT_IN_IMAXABS.
	* extend.texi: Document builtin imaxabs.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@37932 138bc75d-0d04-0410-961f-82ee72b054a4