[compiler-rt] [sanitizer_common] Add experimental flag to tweak dlopen(<main program>) (PR #71715)

[Vitaly Buka via llvm-commits]

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@@ -6304,10 +6304,38 @@ INTERCEPTOR(int, fclose, __sanitizer_FILE *fp) {
 #endif
 
 #if SANITIZER_INTERCEPT_DLOPEN_DLCLOSE
+// Returns 1 if 'suffix' matches the end of 'str', 0 otherwise
+static int internal_is_suffix(const char *suffix, const char *str) {
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vitalybuka wrote:

I guess we usually use `internal_<some libc function>` 

This is a new function, so we can use Camel style with bool as return.
And usually we search the second argument in the first.

https://github.com/llvm/llvm-project/pull/71715