Fix static arrays with dynamic elements not being treated as dynamic in FunctionType::returnParameterTypesWithoutDynamicTypes()

test/libsolidity/semanticTests/various/skip_dynamic_types_for_static_arrays_with_dynamic_elements.sol

@@ -0,0 +1,23 @@
+pragma experimental ABIEncoderV2;
+
+contract C {
+    struct S {
+        bool[] b;
+    }
+
+    function f() public returns (uint256, bool[][2] memory, S[2] memory, uint256) {
+        return (
+            5,
+            [new bool[](1), new bool[](2)],
+            [S(new bool[](2)), S(new bool[](5))],
+            6
+        );
+    }
+
+    function g() public returns (uint256, uint256) {
+        (uint256 a, , , uint256 b) = this.f();
+        return (a, b);
+    }
+}
+// ----
+// g() -> 5, 6