[clang] [compiler-rt] [Sanitizer] add signed-integer-wrap sanitizer (PR #80089)

[Justin Stitt via cfe-commits]

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@@ -0,0 +1,77 @@
+// Check that -fsanitize=signed-integer-wrap instruments with -fwrapv
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JustinStitt wrote:

I must be doing something wrong because it suggest I remove all my `Check: ...`'s and replcae them with `Check: {{.*}}`

https://github.com/llvm/llvm-project/pull/80089