[llvm] [BOLT] Ignore duplicate global symbols (PR #201082)

[Amir Ayupov via llvm-commits]

aaupov wrote:

I ran into the same issue but I believe BOLT is right to report an error in this case.

I don't know if duplicate global symbols constitute an UB, but this is conceptually similar to an ODR violation. At least, this is unspecified/implementation-defined behavior, and I'd avoid perpetuating it with BOLT. The fix belongs in the build configuration.

https://github.com/llvm/llvm-project/pull/201082