[iOS] Update today_extension link flags.

test/ios/gyptest-extension.py

Index: test/ios/gyptest-extension.py
diff --git a/test/ios/gyptest-extension.py b/test/ios/gyptest-extension.py
index 5bfc62b083164bf60ab159fa99e8abcf5f4b4529..c5e76d93ff259aea1d36b3410fbd2ef7e500d0a2 100755
--- a/test/ios/gyptest-extension.py
+++ b/test/ios/gyptest-extension.py
@@ -11,13 +11,18 @@ Verifies that ios app extensions are built correctly.
 import TestGyp
 import TestMac
 import subprocess
+import sys
 
-def CheckStrip(p, n_expected):
-  if "ActionViewController" not in subprocess.check_output(['nm','-gU', p]):
-    print "ActionViewController shouldn't get stripped out."
+def CheckStrip(p, expected):
+  if expected not in subprocess.check_output(['nm','-gU', p]):
+    print expected + " shouldn't get stripped out."
+    test.fail_test()
+
+def CheckEntrypoint(p, expected):
+  if expected not in subprocess.check_output(['nm', p]):
+    print expected + "not found."
     test.fail_test()
 
-import sys
 if sys.platform == 'darwin' and TestMac.Xcode.Version()>="0600":
 
   test = TestGyp.TestGyp(formats=['ninja', 'xcode'])
@@ -35,6 +40,7 @@ if sys.platform == 'darwin' and TestMac.Xcode.Version()>="0600":
       'ExtensionContainer.app/PlugIns/ActionExtension.appex/ActionExtension',
       chdir='extension')
   CheckStrip(path, "ActionViewController")
+  CheckEntrypoint(path, "_NSExtensionMain")
 
   test.pass_test()