Moving some struct tests to semanticTests

test/libsolidity/semanticTests/abiEncoderV2/struct/struct_function.sol

@@ -0,0 +1,16 @@
+pragma experimental ABIEncoderV2;
+
+contract C {
+    struct S { function () external returns (uint) f; uint b; }
+    function f(S memory s) public returns (uint, uint) {
+        return (s.f(), s.b);
+    }
+    function test() public returns (uint, uint) {
+        return this.f(S(this.g, 3));
+    }
+    function g() public returns (uint) { return 7; }
+}
+// ====
+// compileViaYul: also
+// ----
+// test() -> 7, 3