[llvm] [gSYM] Add support merged functions in gSYM format (PR #101604)

[Greg Clayton via llvm-commits]

clayborg wrote:

Do want to somehow keep track of if merged functions come from the same compile unit and only emit if they come from different ones, or only if our new attribute is being used if they are in the same source file?


https://github.com/llvm/llvm-project/pull/101604