Add test invoking a macro with an argument containing (non-macro) parentheses.

The macro invocation is defined to consume all text between a set of
matched parentheses. We previously tested for inner parentheses from a
nested function-like macro invocation. Here we test for inner
parentheses occuring on their own, (not part of another macro
invocation).

tests/022-define-func-arg-with-parens.c

@@ -0,0 +1,2 @@
+#define foo(x) (x)
+foo(argument(including parens)for the win)