Fix unbalanced parenthesis

Putting this CL through to help because orodley@ can't TBR on the
following CL.
https://chromium-review.googlesource.com/c/chromium/src/+/1125704

TBR=dcheng@chromium.org

Bug: 860168
Change-Id: I3673161fbfcd6940bbb508c149fa68c63c546822
Reviewed-on: https://chromium-review.googlesource.com/1125706Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572516}

tools/clang/scripts/generate_compdb.py

@@ -40,7 +40,7 @@ def main(argv):
 
   compdb_text = json.dumps(
       compile_db.ProcessCompileDatabaseIfNeeded(
-          compile_db.GenerateWithNinja(args.p, args.targets))
+          compile_db.GenerateWithNinja(args.p, args.targets)))
   if args.o is None:
     print(compdb_text)
   else: