Fix calldata handling during creation in EVMHost.

test/libsolidity/semanticTests/various/create_calldata.sol

@@ -0,0 +1,14 @@
+contract C {
+	bytes public s;
+	constructor(uint256 x) {
+		// Due to a bug in EVMHost, msg.data used to contain initcode and constructor arguments.
+		s = msg.data;
+		assert(msg.data.length == 0);
+	}
+}
+// ----
+// constructor(): 42 ->
+// gas irOptimized: 147541
+// gas legacy: 177488
+// gas legacyOptimized: 140089
+// s() -> 0x20, 0