Set up the new forwarding hook in the objc_msgSend test.
Set up the new forwarding hook in the objc_msgSend test.

This is probably wrong, as we should be calling forward2 if forward3 is not set, but it makes the test pass for now.

ngrewe/libobjc2,ngrewe/libobjc2,crystax/android-vendor-libobjc2,gnustep/libobjc2,crystax/android-vendor-libobjc2,gnustep/libobjc2