Copy byte arrays from storage to storage.

test/cmdlineTests/yul_unimplemented/err

@@ -1,5 +1,5 @@
-Error (1834): Unimplemented feature error: Copying from storage to storage is not yet implemented. in <FILENAME REMOVED>
- --> yul_unimplemented/input.sol:7:9:
+Error (1834): Unimplemented feature error in <FILENAME REMOVED>
+ --> yul_unimplemented/input.sol:8:9:
   |
-7 |         a = b;
+8 |         x.f();
   |         ^^^^^

test/cmdlineTests/yul_unimplemented/input.sol

@@ -1,9 +1,10 @@
 // SPDX-License-Identifier: GPL-3.0
 pragma solidity >=0.0;
+library L { function f(uint) public {} }
 contract test {
-    bytes a;
-    bytes b;
+    using L for uint;
     function f() public {
-        a = b;
+        uint x;
+        x.f();
     }
 }