Add tests for programs that are invalid by arg-passing-style

Closes #1008

Author: marijnh

src/test/compile-fail/arg-style-mismatch.rs

@@ -0,0 +1,5 @@
+// error-pattern: mismatched types
+
+fn f(&&_x: int) {}
+fn g(_a: fn(+int)) {}
+fn main() { g(f); }

src/test/compile-fail/param-by-value.rs

@@ -0,0 +1,4 @@
+// error-pattern:can not pass a dynamically-sized type by value
+
+fn f<T>(+_x: T) {}
+fn main() {}