Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

objdump-export-list.test
RUN: llvm-objdump --macho --exports-trie %p/Inputs/macho-no-exports.dylib | FileCheck %s

; Test that we don't crash with an empty export list.
CHECK: macho-no-exports.dylib
CHECK: Exports trie: