No bug - Point default b2g xpcshell manifest to proper file, r=aki
No bug - Point default b2g xpcshell manifest to proper file, r=aki

simar7/build-mozharness,lundjordan/mozharness,kartikgupta0909/mozilla-mozharness,lissyx/build-mozharness,lissyx/build-mozharness,armenzg/build-mozharness,kartikgupta0909/build-mozharness,kartikgupta0909/mozilla-mozharness,mrrrgn/build-mozharness,mozilla/build-mozharness,armenzg/build-mozharness,walac/build-mozharness,mrrrgn/build-mozharness,walac/build-mozharness,mozilla/build-mozharness,kartikgupta0909/build-mozharness,kartikgupta0909/gittest,escapewindow/mozharness,kartikgupta0909/gittest,escapewindow/mozharness,simar7/build-mozharness,lundjordan/mozharness