Add other as platform_str

Author: steppi

tests/testing_utils.h

@@ -146,10 +146,12 @@ std::string get_platform_str() {
      * versions. For now, there are these two platforms with tolerance
      * files and we use the former with Clang on Mac and the later
      * otherwise. */
-#if defined(__clang__) && defined(__APPLE__)
+#if defined(__clang__) && defined(__APPLE__) && defined(__arch64__)
     return "clang-darwin-aarch64";
-#else
+#elif defined(__GNUG__) && !defined(__clang__) && defined(__linux__) && defined(__x86_64__)
     return "gcc-linux-x86_64";
+#else
+    return "other";
 #endif
 }