Extract tests.

test/libsolidity/syntaxTests/constructor/library_constructor_old.sol

@@ -0,0 +1,7 @@
+library Lib {
+	function Lib();
+}
+// ----
+// Warning: (15-30): Defining constructors as functions with the same name as the contract is deprecated. Use "constructor(...) { ... }" instead.
+// TypeError: (15-30): Constructor cannot be defined in libraries.
+// TypeError: (15-30): Constructor must be implemented if declared.