don't override libc code in a glibc-specific way when not using glibc

sandbox/linux/services/libc_urandom_override.cc

Index: sandbox/linux/services/libc_urandom_override.cc
diff --git a/sandbox/linux/services/libc_urandom_override.cc b/sandbox/linux/services/libc_urandom_override.cc
index dfb4c269e3ffd10a14f425ceae1580474767372d..913b65ee18edee6dee7bfa8449e6e9bcc69f0697 100644
--- a/sandbox/linux/services/libc_urandom_override.cc
+++ b/sandbox/linux/services/libc_urandom_override.cc
@@ -59,6 +59,7 @@ static void InitLibcFileIOFunctions() {
     g_libc_fopen64 = g_libc_fopen;
   }
 
+#ifdef LIBC_GLIBC

[agl, 2013/06/12 19:19:56]

#if defined(LIBC_GLIBC)

(seems to be the style in this file.)

[Mostyn Bramley-Moore, 2013/06/12 19:38:35]

Done.

   // TODO(sergeyu): This works only on systems with glibc. Fix it to
   // work properly on other systems if necessary.
   g_libc_xstat = reinterpret_cast<XstatFunction>(
@@ -155,6 +156,7 @@ int xstat64_override(int version, const char *path, struct stat64 *buf) {
     return g_libc_xstat64(version, path, buf);
   }
 }
+#endif  // LIBC_GLIBC
 
 #endif  // !ADDRESS_SANITIZER