[llvm] [profgen] Use a 64bit integer for &'ing the loadable address (PR #79930)

[Nathan Lanza via llvm-commits]

lanza wrote:

Yea, no idea. The kernel on my work devserver also has a v_addr higher than `0xffffffff00000000`, so this should have been truncating all along. 

https://github.com/llvm/llvm-project/pull/79930