scripts/verify_log_statements.py: on parse error, print file

If string eval encounters an uncovered parse error, it's useful to know which
file it happened in.

Change-Id: I5fe9a3bbdbfb8a995f24596bf09e70ca5bb3fe8a

scripts/verify_log_statements.py

@@ -63,6 +63,7 @@ def check_file(f):
   if not (f.endswith('.h') or f.endswith('.c') or f.endswith('.cpp')):
     return []
 
+  try:
     errors_found = []
 
     file_content = codecs.open(f, "r", "utf-8").read()
@@ -115,7 +116,9 @@ def check_file(f):
       r.line = line
 
     return errors_found
-
+  except:
+    print("ERROR WHILE PROCESSING %r" % f, file=sys.stderr)
+    raise
 
 all_errors_found = []
 for f in args: