Update tests.

test/externalTests/solc-js/DAO/DAO.sol

@@ -24,7 +24,7 @@ to automate organizational governance and decision-making.
 import "./TokenCreation.sol";
 import "./ManagedAccount.sol";
 
-contract DAOInterface {
+abstract contract DAOInterface {
 
     // The amount of days for which people who try to participate in the
     // creation by calling the fallback function will still get their ether back

test/externalTests/solc-js/DAO/ManagedAccount.sol

@@ -21,7 +21,7 @@ Basic account, used by the DAO contract to separately manage both the rewards
 and the extraBalance accounts.
 */
 
-contract ManagedAccountInterface {
+abstract contract ManagedAccountInterface {
     // The only address with permission to withdraw from this account
     address public owner;
     // If true, only the owner of the account can receive ether from it

test/externalTests/solc-js/DAO/Token.sol

@@ -30,7 +30,7 @@ https://github.com/ethereum/wiki/wiki/Standardized_Contract_APIs
 
 /// @title Standard Token Contract.
 
-contract TokenInterface {
+abstract contract TokenInterface {
     mapping (address => uint256) balances;
     mapping (address => mapping (address => uint256)) allowed;
 
@@ -85,7 +85,7 @@ contract TokenInterface {
     );
 }
 
-contract tokenRecipient {
+abstract contract tokenRecipient {
     function receiveApproval(address _from, uint256 _value, address _token, bytes memory _extraData) public;
 }
 

test/externalTests/solc-js/DAO/TokenCreation.sol

@@ -25,7 +25,7 @@ along with the DAO.  If not, see <http://www.gnu.org/licenses/>.
 import "./Token.sol";
 import "./ManagedAccount.sol";
 
-contract TokenCreationInterface {
+abstract contract TokenCreationInterface {
 
     // End of token creation, in Unix time
     uint public closingTime;