Moving some bytes and array tests to semanticTests

test/libsolidity/semanticTests/array/copying/bytes_inside_mappings.sol

@@ -0,0 +1,15 @@
+contract c {
+    function set(uint key) public returns (bool) { data[key] = msg.data; return true; }
+    function copy(uint from, uint to) public returns (bool) { data[to] = data[from]; return true; }
+    mapping(uint => bytes) data;
+}
+// ----
+// set(uint256): 1, 2 -> true
+// set(uint256): 2, 2, 3, 4, 5 -> true
+// storage: nonempty
+// copy(uint256,uint256): 1, 2 -> true
+// storage: nonempty
+// copy(uint256,uint256): 99, 1 -> true
+// storage: nonempty
+// copy(uint256,uint256): 99, 2 -> true
+// storage: empty