fix microsoft clc with llvm 16+ -v1

In https://github.com/llvm/llvm-project/commit/e1b88c8a09be25b86b13f98755a9bd744b4dbf14 the llvm project changed the path to get to clang headers. before that commit they used the full version in the path, now they use only the major version in the path.

the commit was merged into llvm stable before v 16 was released , so mesa built against llvm 16+ needs changes.

The changes for rusticl were implemented in e22491c8 but microsoft-clc was overlooked and is handled in this MR.

see #7742 (closed)