Update linphone submodule for echo canceller.

.classpath

@@ -4,6 +4,7 @@
 	<classpathentry excluding="org/linphone/mediastream/MediastreamerActivity.java" kind="src" path="submodules/linphone/mediastreamer2/java/src"/>
 	<classpathentry kind="src" path="submodules/linphone/java/j2se"/>
 	<classpathentry kind="src" path="submodules/linphone/java/common"/>
+	<classpathentry kind="src" path="submodules/linphone/java/impl"/>
 	<classpathentry excluding="org/linphone/core/tutorials/" kind="src" path="src"/>
 	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
 	<classpathentry exported="true" kind="lib" path="libs/aXMLRPC.jar"/>

src/org/linphone/LinphoneManager.java

@@ -66,6 +66,7 @@ of the License, or (at your option) any later version.
 import org.linphone.core.LinphoneCore.MediaEncryption;
 import org.linphone.core.LinphoneCore.RegistrationState;
 import org.linphone.core.LinphoneCore.Transports;
+import org.linphone.core.LinphoneChatMessage;
 import org.linphone.core.LinphoneCoreException;
 import org.linphone.core.LinphoneCoreFactory;
 import org.linphone.core.LinphoneCoreListener;
@@ -926,6 +927,7 @@ public void textReceived(LinphoneCore lc, LinphoneChatRoom cr,
 		if (textReceivedListener != null)
 			textReceivedListener.onTextReceived(from, message);
 	}
+	public void messageReceived(LinphoneCore lc, LinphoneChatRoom cr, LinphoneChatMessage message) {}
 	public void dtmfReceived(LinphoneCore lc, LinphoneCall call, int dtmf) {
 		if (dtmfReceivedListener != null)
 			dtmfReceivedListener.onDTMFReceived(call, dtmf);