Andrew Kelley 33d4742456 LLVM: more fine-grained sancov emit options
Exposes sanitizer coverage flags to the target machine emit function.
Makes it easier to change sancov options without rebuilding the C++
files.

This also enables PCTable = true for sancov which is needed by AFL, and
adds the corresponding Clang flag.
2024-07-23 16:04:58 -07:00
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