Add build flag to enable bitcode on ios

webrtc/build/ios/BUILD.gn

Index: webrtc/build/ios/BUILD.gn
diff --git a/webrtc/examples/androidapp/third_party/autobanh/BUILD.gn b/webrtc/build/ios/BUILD.gn
similarity index 64%
copy from webrtc/examples/androidapp/third_party/autobanh/BUILD.gn
copy to webrtc/build/ios/BUILD.gn
index d5f6b0f2d6a043aa2b439e30648e39cbd5bc20d1..4446184bec6c823c67f250e48a6a1963fc39cafd 100644
--- a/webrtc/examples/androidapp/third_party/autobanh/BUILD.gn
+++ b/webrtc/build/ios/BUILD.gn
@@ -6,8 +6,15 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("//build/config/android/rules.gni")
+# this file is only meant to be included on iOS.

[kjellander_webrtc, 2016/11/07 11:17:35]

Start comment with capital letter.

[kthelgason, 2016/11/09 09:42:40]

Done.

+assert(is_ios)
 
-android_java_prebuilt("autobanh_java") {
-  jar_path = "lib/autobanh.jar"
+declare_args() {
+  rtc_ios_enable_bitcode = false

[kjellander_webrtc, 2016/11/07 11:17:35]

Please add a line documenting what this does and why one would want to enable
it.

[kthelgason, 2016/11/09 09:42:40]

Done.

+}
+
+config("rtc_ios_common_config") {
+  if (rtc_ios_enable_bitcode) {
+    cflags = [ "-fembed-bitcode" ]
+  }
 }