Don't fail a test just because we aren't root.

If the tests are not being run as root, emit a message and don't
continue with the test.

Change-Id: I352e1a4162caaeb18b81b8daf44797009756dcd9
diff --git a/tests/dlext_test.cpp b/tests/dlext_test.cpp
index 9a96b67..7bd59c8 100644
--- a/tests/dlext_test.cpp
+++ b/tests/dlext_test.cpp
@@ -260,6 +260,11 @@
 }
 
 TEST_F(DlExtRelroSharingTest, VerifyMemorySaving) {
+  if (geteuid() != 0) {
+    GTEST_LOG_(INFO) << "This test must be run as root.\n";
+    return;
+  }
+
   ASSERT_NO_FATAL_FAILURE(CreateRelroFile(LIBNAME));
   int relro_fd = open(relro_file_, O_RDONLY);
   ASSERT_NOERROR(relro_fd);