[NaCl SDK] Convert python scripts from optparse to argparse.

native_client_sdk/src/tools/tests/nacl_config_test.py

Index: native_client_sdk/src/tools/tests/nacl_config_test.py
diff --git a/native_client_sdk/src/tools/tests/nacl_config_test.py b/native_client_sdk/src/tools/tests/nacl_config_test.py
index 31957c59aeb97ba4b6a283ce2a523810a78fc4ba..b0cbe26f28778dddb086cbf888beeb813a789b91 100755
--- a/native_client_sdk/src/tools/tests/nacl_config_test.py
+++ b/native_client_sdk/src/tools/tests/nacl_config_test.py
@@ -10,7 +10,7 @@ import unittest
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 TOOLS_DIR = os.path.dirname(SCRIPT_DIR)
 CHROME_SRC = os.path.dirname(os.path.dirname(os.path.dirname(TOOLS_DIR)))
-MOCK_DIR = os.path.join(CHROME_SRC, "third_party", "pymock")
+MOCK_DIR = os.path.join(CHROME_SRC, 'third_party', 'pymock')
 
 # For the mock library
 sys.path.append(MOCK_DIR)
@@ -40,6 +40,13 @@ class TestNaclConfig(unittest.TestCase):
     self.patches.append(patch)
     return patch.start()
 
+  @mock.patch('nacl_config.GetCFlags')
+  def testMainArgParsing(self, mock_get_cflags):
+    mock_get_cflags.return_value = 'flags'
+    with mock.patch('sys.stdout'):
+      nacl_config.main(['--cflags'])
+    mock_get_cflags.assert_called()
+
   def testCFlags(self):
     cases = {
         'newlib': '-I/sdk_root/include -I/sdk_root/include/newlib',