Changes

Summary

1. [ValueTracking] Use a switch statement (NFC) (details)
2. [RISCV] Silence unused variable warning in Release builds. NFC. (details)
3. [LIT] Correcting max-failures option in lit documentation. (details)
4. Add OpenBSD support to be able to retrieve the thread id (details)

Commit 323cb26cef4a1766b660745c38238617c1f1cf33 by nikita.ppv [ValueTracking] Use a switch statement (NFC)
	llvm/lib/Analysis/ValueTracking.cpp
Commit 85b53598a984025afd96f2a00231ac6b0f20d7b2 by benny.kra [RISCV] Silence unused variable warning in Release builds. NFC.
	llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
Commit 8cd117c24f48428e01f88cf18480e5af7eb20c0c by Mike Edwards [LIT] Correcting max-failures option in lit documentation.
	llvm/docs/CommandGuide/lit.rst
Commit 66b7ba52b7b49cb712c337b934440049ab94454b by brad Add OpenBSD support to be able to retrieve the thread id
	llvm/lib/Support/Unix/Threading.inc