[clang] Diagnose problematic uses of constructor/destructor attribute (PR #67673)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> I _think_ I made the correct changes in compiler-rt's CMake so that all of the compiler-rt projects can use reserved priorities, but I'd appreciate confirmation from @MaskRay on those changes.

Hmm, nope, it seems the test cases still fail (but the source files work).

https://github.com/llvm/llvm-project/pull/67673