Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

high-pc-constant.test
RUN: llvm-symbolizer --inlining --obj=%p/Inputs/dwarfdump-inl-test.high_pc.elf-x86-64 0x568 | FileCheck %s

CHECK:      inlined_h
CHECK-NEXT: dwarfdump-inl-test.h:3
CHECK-NEXT: inlined_g
CHECK-NEXT: dwarfdump-inl-test.h:7
CHECK-NEXT: inlined_f
CHECK-NEXT: dwarfdump-inl-test.cc:3
CHECK-NEXT: main
CHECK-NEXT: dwarfdump-inl-test.cc:8