Relax delegatecall type restriction plus test

test/libsolidity/syntaxTests/functionTypes/declaration_type_conversion.sol

@@ -8,4 +8,5 @@ contract C {
 	}
 }
 // ----
-// TypeError 1080: (117-130): True expression's type function D.f() does not match false expression's type function D.g().
+// TypeError 9717: (121-124): Invalid mobile type in true expression.
+// TypeError 3703: (127-130): Invalid mobile type in false expression.

test/libsolidity/syntaxTests/functionTypes/ternary_contract_delegate_function.sol

@@ -0,0 +1,12 @@
+library L {
+    function f() external {}
+}
+
+contract C {
+    function test() public {
+        (true ? L.f : L.f).selector;
+    }
+}
+
+// ----
+// TypeError 9582: (94-121): Member "selector" not found or not visible after argument-dependent lookup in function ().