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_c.c

@@ -24,6 +24,7 @@ struct MyStruct {
 
 FAKE_VOID_FUNC(voidfunc1, int);
 FAKE_VOID_FUNC(voidfunc2, char, char);
+FAKE_VOID_FUNC(voidfunc1outparam, char *);
 FAKE_VALUE_FUNC(long, longfunc0);
 FAKE_VALUE_FUNC(enum MYBOOL, enumfunc0);
 FAKE_VALUE_FUNC(struct MyStruct, structfunc0);
@@ -36,6 +37,7 @@ void setup()
 {
     RESET_FAKE(voidfunc1);
     RESET_FAKE(voidfunc2);
+    RESET_FAKE(voidfunc1outparam);
     RESET_FAKE(longfunc0);
     RESET_FAKE(enumfunc0);
     RESET_FAKE(structfunc0);