[clang] [Clang] Allow the value of unroll count to be zero in `#pragma GCC unroll` and `#pragma unroll` (PR #88666)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

1 nit, else this lgtm.

https://github.com/llvm/llvm-project/pull/88666