Code cleanup and add another Cilksan hook#31

Merged

neboat merged 3 commits intoOpenCilk:devfrom neboat:v2.0-edits

Aug 29, 2022

+62-8

Commits on Aug 23, 2022

[cilkscale] Cleanup some code.
neboat
committed

Commits on Aug 28, 2022

[cilksan] Add hook for LLVM intrinsic for x86 pause instruction. Fix issue OpenCilk/infrastructure#21 .
neboat
committed
[cilksan] Add hook for AArch64 hint intrinsic.
neboat
committed