GN Templates: Move common_config to the template.

webrtc/sdk/BUILD.gn

Index: webrtc/sdk/BUILD.gn
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index 69ec091a790314c9f75ad73facf7f045b033bad3..657e3b9156d72b35719366befb8e30fe88905fc9 100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -22,10 +22,7 @@ if (is_ios || (is_mac && mac_deployment_target == "10.7")) {
     deps = [
       "../base:rtc_base",
     ]
-    configs += [
-      "..:common_config",
-      "//build/config/compiler:enable_arc",
-    ]
+    configs += [ "//build/config/compiler:enable_arc" ]
     public_configs = [
       "..:common_inherited_config",
       ":rtc_sdk_common_objc_config",
@@ -189,6 +186,7 @@ if (is_ios || (is_mac && mac_deployment_target == "10.7")) {
       "..:common_objc",
       "//build/config/compiler:enable_arc",
     ]
+    suppressed_configs += [ rtc_common_config ]

[kjellander_webrtc, 2016/09/05 06:50:28]

Same here, if needed, add a TODO (separate bug from the others). In this case
you can assign the bug to tkchin@.

 
     public_configs = [ ":rtc_sdk_common_objc_config" ]