[llvm] [BOLT] Enable standalone build (PR #97130)

[Rafael Auler via llvm-commits]

rafaelauler wrote:

As a developer I like the idea that I can run BOLT out of the build directory. With these changes, because the runtime libs are not available in the root's lib folder, running BOLT from the build directory only works if you don't use any runtime libs. Is this something that can be preserved somehow?

https://github.com/llvm/llvm-project/pull/97130