* argv.c: Use ANSI_PROTOTYPES instead of __STDC__.
	* memchr.c: Likewise.
	* strcasecmp.c: Likewise.
	* strncasecmp.c: Likewise.
	* strncmp.c: Likewise.
	* xatexit.c: Likewise.
	* xmalloc.c: Likewise.

	* copysign.c: Use traditional function declaration instead of DEFUN.
	* sigsetmask.c: Likewise.

	* memcmp.c: Both of the above, ANSI_PROTOTYPES and DEFUN.
	* memset.c: Likewise.

	* memcpy.c: ANSI_PROTOTYPES, DEFUN and prototype bcopy.
	* memmove.c: Likewise.

From-SVN: r65619