[llvm] [llvm-objdump] Fix --disassembler-color with --macho flag (PR #163815)

[Ryan Mansfield via llvm-commits]

rjmansfield wrote:

Test failure is unrelated:

```
# | Input was:
# | <<<<<<
# |              1: opt: /home/gha/actions-runner/_work/llvm-project/llvm-project/polly/lib/Support/RegisterPasses.cpp:482: llvm::Expected<bool> polly::parseCGPipeline(StringRef, llvm::CGSCCPassManager &, PassInstrumentationCallbacks *, ArrayRef<PassBuilder::PipelineElement>): Assertion `Pipeline.empty()' failed. 
# | check:205'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |              2: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug. 
# | check:205'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |              3: Stack dump: 
# | check:205'0     ~~~~~~~~~~~~
# |              4: 0. Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -disable-output -debug-pass-manager -passes=no-op-cgscc(no-op-cgscc,whatever) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Other/pass-pipeline-parsing.ll 
# | check:205'0   
```

https://github.com/llvm/llvm-project/pull/163815