Let's enable validation of examples. failures should trip errors.

Also make them verbose so we can see what is going on.

examples/make_example/Makefile

@@ -23,7 +23,7 @@ ${BUILD_DIR}/main: ${SRC_DIR}/main.c ${SRC_DIR}/foo.c
 	${CC} $< -o $@
 
 run:
-	./build/main || true
+	./build/main
 
 test: setup
 

examples/make_example/test/test_foo.c

@@ -13,5 +13,5 @@ void test_foo_init_should_initialize_multiplier()
 {
     foo_init();
 
-    TEST_ASSERT_FALSE(1);
+    TEST_ASSERT_FALSE(0);
 }