Fix the development build.

* Shared/EntryPointUtilities/mac/XPCService/XPCServiceBootstrapper.Development.h:
(WebKit::XPCServiceEventHandler):
Use the right stringizer.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140920 268f45cc-cd09-0410-ab3c-d52691b4dbfc