[quiz] Abort on assertion failure

This allows CI to handle test failures correctly

quiz/src/assertions.cpp

@@ -4,8 +4,6 @@
 
 void quiz_assert(bool condition) {
   if (!condition) {
-    // We want to keep what the screen is displaying so we cannot abort
-    while (1) {
-    }
+    abort();
   }
 }