[llvm] [GSYM] Add support for querying merged functions in llvm-gsymutil (PR #120991)

[Hans Wennborg via llvm-commits]

zmodem wrote:

The Windows issue should be fixed with https://github.com/llvm/llvm-project/commit/51d7605df9647f54d702df1f7d4029e95dce7156

https://github.com/llvm/llvm-project/pull/120991