[perf/benchmark-ot] Add one more test

perf/benchmark-ot.cc

@@ -26,6 +26,7 @@ static void BM_hb_ot_tags_from_script_and_language (benchmark::State& state,
 					 language_tags /* OUT */);
   }
 }
+BENCHMARK_CAPTURE (BM_hb_ot_tags_from_script_and_language, COMMON abcd_XY, HB_SCRIPT_COMMON, "abcd_XY");
 BENCHMARK_CAPTURE (BM_hb_ot_tags_from_script_and_language, COMMON zh_CN, HB_SCRIPT_COMMON, "zh_CN");
 BENCHMARK_CAPTURE (BM_hb_ot_tags_from_script_and_language, COMMON en_US, HB_SCRIPT_COMMON, "en_US");
 BENCHMARK_CAPTURE (BM_hb_ot_tags_from_script_and_language, LATIN en_US, HB_SCRIPT_LATIN, "en_US");