merge from gcc

libiberty/strncmp.c

@@ -13,16 +13,10 @@ Compares the first @var{n} bytes of two strings, returning a value as
 */
 
 #include <ansidecl.h>
-#ifdef ANSI_PROTOTYPES
 #include <stddef.h>
-#else
-#define size_t unsigned long
-#endif
 
 int
-strncmp(s1, s2, n)
-     const char *s1, *s2;
-     register size_t n;
+strncmp(const char *s1, const char *s2, register size_t n)
 {
   register unsigned char u1, u2;