Remove visiblity of libraries in inherited contracts.

test/libsolidity/syntaxTests/scoping/library_inherited.sol

@@ -0,0 +1,17 @@
+library Lib {
+    function foo(uint256 value) internal returns (uint256) {
+        return value + 42;
+    }
+}
+
+contract A {
+    using Lib for uint256;
+}
+
+contract B is A {
+    function bar(uint256 value) public returns (uint256) {
+        return value.foo(); // Usage of Lib
+    }
+}
+// ----
+// TypeError 9582: (246-255): Member "foo" not found or not visible after argument-dependent lookup in uint256.

test/libsolidity/syntaxTests/scoping/library_inherited2.sol

@@ -0,0 +1,16 @@
+library Lib {
+    function foo(uint256 value) internal pure returns (uint256) {
+        return value + 42;
+    }
+}
+
+contract A {
+    using Lib for uint256;
+}
+
+contract B is A {
+    using Lib for uint256;
+    function bar(uint256 value) public pure returns (uint256) {
+        return value.foo(); // Usage of Lib
+    }
+}