ipc: eventually use stat64 in ftok()

PR 4201
ftok() always used 32bit stat

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/misc/sysvipc/ftok.c

@@ -19,14 +19,18 @@
 
 #include <sys/ipc.h>
 #include <sys/stat.h>
-
+#ifdef __UCLIBC_HAS_LFS__
+# include <_lfs_64.h>
+#else
+# define stat64 stat
+#endif
 
 key_t ftok (const char *pathname, int proj_id)
 {
-  struct stat st;
+  struct stat64 st;
   key_t key;
 
-  if (stat(pathname, &st) < 0)
+  if (stat64(pathname, &st) < 0)
     return (key_t) -1;
 
   key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16)