Updates compiled unit tests to new constructor syntax.

test/libsolidity/SolidityNameAndTypeResolution.cpp

@@ -100,7 +100,7 @@ BOOST_AUTO_TEST_CASE(implement_abstract_via_constructor)
 	SourceUnit const* sourceUnit = nullptr;
 	char const* text = R"(
 		contract base { function foo(); }
-		contract foo is base { function foo() public {} }
+		contract foo is base { constructor() public {} }
 	)";
 	sourceUnit = parseAndAnalyse(text);
 	std::vector<ASTPointer<ASTNode>> nodes = sourceUnit->nodes();