Added two test cases for SET_CUSTOM_FAKE_SEQ

Using a function that sets a value on a variable via a char pointer, we
test the following:
1 - Does the custom fakes are called in the expected order?
2 - When the sequence length is exhausted, do we only call the last
    custom fake in the sequence from then on?

test/fff_test_global_cpp.cpp

@@ -14,6 +14,7 @@ public:
         RESET_FAKE(voidfunc1);
         RESET_FAKE(voidfunc2);
         RESET_FAKE(longfunc0);
+        RESET_FAKE(voidfunc1outparam);
         FFF_RESET_HISTORY();
     }
 };