Catch the error in preparing OSS-Fuzz for benchmark generation. (#94)

Seeing this error occurred on some projects when generating benchmarks.
Log the project name for this error in case this happens again so that
we can re-generate the benchmark.yaml for that project.

Author: DonggeLiu

data_prep/introspector.py

@@ -351,8 +351,12 @@ def get_project_funcs(project_name: str) -> Dict[str, List[Dict]]:
   else:
     outdir = ''
 
-  oss_fuzz_checkout.clone_oss_fuzz()
-  oss_fuzz_checkout.postprocess_oss_fuzz()
+  try:
+    oss_fuzz_checkout.clone_oss_fuzz()
+    oss_fuzz_checkout.postprocess_oss_fuzz()
+  except subprocess.CalledProcessError as e:
+    logging.error('Failed to prepare OSS-Fuzz directory for project %s: %s',
+                  sys.argv[1], e)
   cur_project_language = oss_fuzz_checkout.get_project_language(cur_project)
   benchmarks = populate_benchmarks_using_introspector(cur_project,
                                                       cur_project_language,