Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

gmlt.test
; RUN: %llc_dwarf -O0 -filetype=obj < %S/../Inputs/gmlt.ll | llvm-dwarfdump -v - | FileCheck %S/../Inputs/gmlt.ll

; There's a darwin specific test in X86/gmlt, so it's okay to XFAIL this here.
; XFAIL: darwin