Just like with production services, we now have separate XPC services for 32-bit and 64-bit in development. So in fat builds, they are the correct architecture form the start, and in non-fat builds, there is no code for another architecture anyway, so specifying it doesn't help.
Created attachment 246134 [details]
Comment on attachment 246134 [details]
Clearing flags on attachment: 246134
Committed r179732: <http://trac.webkit.org/changeset/179732>
All reviewed patches have been landed. Closing bug.