Bug 1371871 - Do not process XPIDL in the tup backend during an artifact build. r=mshal

MozReview-Commit-ID: AtnXcv6iPRD

--HG--
extra : rebase_source : f0f9699fb16c0f93c01af5fd6099b87b1855af32

python/mozbuild/mozbuild/backend/tup.py

@@ -379,6 +379,9 @@ class TupOnly(CommonBackend, PartialBackend):
                                  destdir=mozpath.join(self.environment.topobjdir, obj.install_target, path))
 
     def _handle_idl_manager(self, manager):
+        if self.environment.is_artifact_build:
+            return
+
         dist_idl_backend_file = self._get_backend_file('dist/idl')
         for idl in manager.idls.values():
             dist_idl_backend_file.symlink_rule(idl['source'], output_group=self._installed_files)