Sort tests.

test/libsolidity/semanticTests/constants/constant_string.sol

@@ -0,0 +1,22 @@
+contract C {
+    bytes constant a = "\x03\x01\x02";
+    bytes constant b = hex"030102";
+    string constant c = "hello";
+
+    function f() public returns (bytes memory) {
+        return a;
+    }
+
+    function g() public returns (bytes memory) {
+        return b;
+    }
+
+    function h() public returns (bytes memory) {
+        return bytes(c);
+    }
+}
+
+// ----
+// f() -> 0x20, 3, "\x03\x01\x02"
+// g() -> 0x20, 3, "\x03\x01\x02"
+// h() -> 0x20, 5, "hello"