MacOS fixes

TestDriver.cpp

@@ -10,7 +10,7 @@ int main(int argc, char **argv) {
     std::ifstream t(argv[i], std::ios::binary);
     std::stringstream buffer;
     buffer << t.rdbuf();
-    auto str = buffer.view();
+    auto str = buffer.str();
     LLVMFuzzerTestOneInput((const uint8_t *)str.data(), str.size());
   }
 }