Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

BUILD.gn
executable("llvm-mc") {
  deps = [
    "//llvm/lib/MC",
    "//llvm/lib/MC/MCParser",
    "//llvm/lib/Support",
    "//llvm/lib/Target:TargetsToBuild",
  ]
  sources = [
    "Disassembler.cpp",
    "llvm-mc.cpp",
  ]
}