[sanitizers] Make sure that all complex macros uses parenthesis

Summary:
Without them expressions like this may have different values.
(SANITIZER_INTERCEPT_MEMRCHR && SANITIZER_INTERCEPT_PREADV)

Reviewers: alekseyshl

Subscribers: srhines, kubamracek, llvm-commits

Differential Revision: https://reviews.llvm.org/D35512

llvm-svn: 308228