[llvm] [BOLT] support mold linker generated PLT in disassembling (PR #115256)

[Maksim Panchenko via llvm-commits]

maksfb wrote:

Thank you for the patch and for including the test case. To avoid the introduction of the new option, would it be possible to automatically detect the PLT header code instead? I suggest to add a new match function to `X86MCPlusBuilder` and call it from `disassemblePLTSectionX86()`.

https://github.com/llvm/llvm-project/pull/115256