Fix checks for "using for ... global" for libraries.

test/libsolidity/semanticTests/using/library_on_interface.sol

@@ -0,0 +1,18 @@
+using L for I;
+interface I { function f() external pure returns (uint); }
+library L {
+    function execute(I i) internal pure returns (uint) {
+        return i.f();
+    }
+}
+contract C is I {
+    function x() public view returns (uint) {
+        I i = this;
+        return i.execute();
+    }
+    function f() public pure returns (uint) { return 7; }
+}
+// ====
+// compileViaYul: also
+// ----
+// x() -> 7

test/libsolidity/semanticTests/using/using_global_all_the_types.sol

@@ -0,0 +1,38 @@
+==== Source: A ====
+enum E {A, B}
+struct S { uint x; }
+type T is uint;
+using L for E global;
+using L for S global;
+using L for T global;
+library L {
+    function f(E e) internal pure returns (uint) {
+        return uint(e);
+    }
+    function f(S memory s) internal pure returns (uint) {
+        return s.x;
+    }
+    function f(T t) internal pure returns (uint) {
+        return T.unwrap(t);
+    }
+}
+
+==== Source: B ====
+contract C {
+    function f() public pure returns (uint a, uint b, uint c) {
+        E e = E.B;
+        a = e.f();
+        S memory s;
+        s.x = 7;
+        b = s.f();
+        T t = T.wrap(9);
+        c = t.f();
+    }
+}
+
+import {E, S, T} from "A";
+
+// ====
+// compileViaYul: also
+// ----
+// f() -> 1, 7, 9