eof: Enable one semantic test to sanity check.

Author: rodiazet

test/libsolidity/semanticTests/ecrecover/ecrecover.sol

@@ -3,6 +3,8 @@ contract test {
         return ecrecover(h, v, r, s);
     }
 }
+// ====
+// bytecodeFormat: legacy,>=EOFv1
 // ----
 // a(bytes32,uint8,bytes32,bytes32):
 // 0x18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c,