tile: add inhibit_loop_to_libcall to string functions

Without this, on gcc 4.8.2 the built glibc crashes when memcpy
or memset are invoked, since they call themselves recursively.
See commit 85c2e6110c for the generic inhibit_loop_to_libcall.

ChangeLog

@@ -1,3 +1,10 @@
+2014-12-11  Chris Metcalf  <cmetcalf@ezchip.com>
+
+	* sysdeps/tile/tilegx/memset.c (__memcpy): Add
+	inhibit_loop_to_libcall to avoid recursive calls.
+	* sysdeps/tile/tilegx/memcpy.c (__memcpy): Likewise.
+	* sysdeps/tile/tilepro/memcpy.c (__memcpy): Likewise.
+
 2014-12-11  Adhemerval Zanella  <Azanella@linux.vnet.ibm.com>
 
 	* include/sys/socket.h (__sendmmsg): Add __USE_GNU guards on function

sysdeps/tile/tilegx/memcpy.c

@@ -25,7 +25,7 @@
 /* How many cache lines ahead should we prefetch? */
 #define PREFETCH_LINES_AHEAD 3
 
-void *
+void * inhibit_loop_to_libcall
 __memcpy (void *__restrict dstv, const void *__restrict srcv, size_t n)
 {
   char *__restrict dst1 = (char *) dstv;

sysdeps/tile/tilegx/memset.c

@@ -21,7 +21,7 @@
 #include <stdint.h>
 #include "string-endian.h"
 
-void *
+void * inhibit_loop_to_libcall
 __memset (void *s, int c, size_t n)
 {
   uint64_t *out64;

sysdeps/tile/tilepro/memset.c

@@ -20,7 +20,7 @@
 #include <stdint.h>
 #include <arch/chip.h>
 
-void *
+void * inhibit_loop_to_libcall
 __memset (void *s, int c, size_t n)
 {
   uint32_t *out32;