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;