Sort tests.

test/libsolidity/semanticTests/array/bytes_length_member.sol

@@ -0,0 +1,17 @@
+contract c {
+    function set() public returns (bool) {
+        data = msg.data;
+        return true;
+    }
+
+    function getLength() public returns (uint256) {
+        return data.length;
+    }
+
+    bytes data;
+}
+
+// ----
+// getLength() -> 0
+// set(): 1, 2 -> true
+// getLength() -> 68