Allow x86 when build WebRTC.framework for iOS

Bug: webrtc:9203
Change-Id: Id331b14fc1a0695a561f52acd767645caa7f3b49
Reviewed-on: https://webrtc-review.googlesource.com/72940
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23054}
diff --git a/tools_webrtc/ios/build_ios_libs.py b/tools_webrtc/ios/build_ios_libs.py
index 76a61f1..46508cf 100755
--- a/tools_webrtc/ios/build_ios_libs.py
+++ b/tools_webrtc/ios/build_ios_libs.py
@@ -156,10 +156,6 @@
     _CleanTemporary(args.output_dir, architectures)
     return 0
 
-  # Ignoring x86 for now because of a GN build issue
-  # where the generated dynamic framework has the wrong architectures.
-  architectures.remove('x86')
-
   gn_target_name = 'framework_objc'
   if not args.bitcode:
     gn_args.append('enable_dsyms=true')