re PR sanitizer/64013 (libsanitizer fails to build)

	PR sanitizer/64013
	* sanitizer_common/sanitizer_linux.cc (FileExists): Cherry pick
	upstream r222532.

From-SVN: r217921

libsanitizer/ChangeLog

+2014-11-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/61137
+	* config/ia64/ia64.c (ia64_attribute_takes_identifier_p): New function.
+	(TARGET_ATTRIBUTE_TAKES_IDENTIFIER_P): Redefine to it.
+
 2014-11-14  Uros Bizjak  <ubizjak@gmail.com>
 
 	* sanitizer_common/Makefile.am (AM_CXXFLAGS): Use -std=gnu++11.

libsanitizer/sanitizer_common/sanitizer_linux.cc

@@ -281,17 +281,15 @@ uptr internal_execve(const char *filename, char *const argv[],
 
 // ----------------- sanitizer_common.h
 bool FileExists(const char *filename) {
-#if SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
   struct stat st;
+#if SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
   if (internal_syscall(SYSCALL(newfstatat), AT_FDCWD, filename, &st, 0))
-    return false;
 #else
-  struct stat st;
   if (internal_stat(filename, &st))
+#endif
     return false;
   // Sanity check: filename is a regular file.
   return S_ISREG(st.st_mode);
-#endif
 }
 
 uptr GetTid() {