Fix compile for write_callback_test in ROCKSDB_LITE

Summary: Add main for write_callback_test when compiled under ROCKSDB_LITE

Test Plan: write_callback_test

Reviewers: igor, sdong, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42147

db/write_callback_test.cc

@@ -117,4 +117,13 @@ int main(int argc, char** argv) {
   return RUN_ALL_TESTS();
 }
 
-#endif  // ROCKSDB_LITE
+#else
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+  fprintf(stderr,
+          "SKIPPED as WriteWithCallback is not supported in ROCKSDB_LITE\n");
+  return 0;
+}
+
+#endif  // !ROCKSDB_LITE