Fix failure of sst_file_reader_test in LITE mode regression test (#4725)

Summary:
Add a dummy main() in sst_file_reader_test for ROCKSDB_LITE to fix link failure in regression
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4725

Differential Revision: D13252885

Pulled By: anand1976

fbshipit-source-id: 0e22b964815e2bf01aff7d03ed4ae59d44fa86f1

table/sst_file_reader_test.cc

@@ -95,4 +95,12 @@ int main(int argc, char** argv) {
   return RUN_ALL_TESTS();
 }
 
+#else
+#include <stdio.h>
+
+int main(int /*argc*/, char** /*argv*/) {
+  fprintf(stderr, "SKIPPED as SstFileReader is not supported in ROCKSDB_LITE\n");
+  return 0;
+}
+
 #endif  // ROCKSDB_LITE