Filter added to prune files before applying network annotation extractor.

tools/clang/scripts/run_tool.py

Index: tools/clang/scripts/run_tool.py
diff --git a/tools/clang/scripts/run_tool.py b/tools/clang/scripts/run_tool.py
index ce4888cc391bbce6823b490e06ecb0f6933d1c8e..40be50afa38182fc9e392f50effd39de0b96c26f 100755
--- a/tools/clang/scripts/run_tool.py
+++ b/tools/clang/scripts/run_tool.py
@@ -202,6 +202,9 @@ def main():
       required=True,
       help='path to the directory that contains the compile database')
   parser.add_argument(
+      '--source-filenames',
+      help='optional path to a file including filenames to process')
+  parser.add_argument(
       'path_filter',
       nargs='*',
       help='optional paths to filter what files the tool is run on')
@@ -223,6 +226,8 @@ def main():
 
   if args.all:
     source_filenames = set(_GetFilesFromCompileDB(args.p))
+  elif args.source_filenames:
+    source_filenames = open(args.source_filenames, 'r').read().split('\n')
   else:
     git_filenames = set(_GetFilesFromGit(args.path_filter))
     # Filter out files that aren't C/C++/Obj-C/Obj-C++.