[llvm] [BOLT][NFC] Add allocator id to createInstrIncMemory (PR #68709)

[Job Noorman via llvm-commits]

mtvec wrote:

> Overall LG, but probably needs riscv implementation, since by it's own seems to be meaningless..

That will be part of the PR implementing instrumentation for RISC-V. Still waiting for a few dependent patches to land before submitting that one.

https://github.com/llvm/llvm-project/pull/68709