Convert __stpcpy_chk and __strcpy_chk to prototype-style function
definitions.  Upstream, this happened as part of:

commit 0d0325ed4b1052f32069eb3a51f7e16485a73568
Author: Ondřej Bílka <neleai@seznam.cz>
Date:   Tue Aug 25 12:23:24 2015 +0200

    Fix strcpy_chk and stpcpy_chk performance.

diff --git a/debug/stpcpy_chk.c b/debug/stpcpy_chk.c
index 3934d132d930093c..ba8058051857ef16 100644
--- a/debug/stpcpy_chk.c
+++ b/debug/stpcpy_chk.c
@@ -24,10 +24,7 @@
 
 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
 char *
-__stpcpy_chk (dest, src, destlen)
-     char *dest;
-     const char *src;
-     size_t destlen;
+__stpcpy_chk (char *dest, const char *src, size_t destlen)
 {
   char *d = dest;
   const char *s = src;
diff --git a/debug/strcpy_chk.c b/debug/strcpy_chk.c
index ee22b11cd33afdde..7cbe14a327dc7992 100644
--- a/debug/strcpy_chk.c
+++ b/debug/strcpy_chk.c
@@ -23,10 +23,7 @@
 
 /* Copy SRC to DEST with checking of destination buffer overflow.  */
 char *
-__strcpy_chk (dest, src, destlen)
-     char *dest;
-     const char *src;
-     size_t destlen;
+__strcpy_chk (char *dest, const char *src, size_t destlen)
 {
   char c;
   char *s = (char *) src;