library: Exclude the check_memwipe() function from AddressSanitizer

Newer versions of AddressSanitizer (e.g. in Ubuntu 24.04) will report
this now as stack-use-after-return.

src/libstrongswan/library.c

@@ -278,6 +278,7 @@ static void do_magic(int *magic, int **out)
 /**
  * Check if memwipe works as expected
  */
+ADDRESS_SANITIZER_EXCLUDE
 static bool check_memwipe()
 {
 	int magic = 0xCAFEBABE, *buf, i;