CheckVoiceData.java: use CHECK_VOICE_DATA_FAIL instead of CHECK_VOICE_DATA_MISSING_DATA to fix a deprecated warning using API 18.

android/project.properties

 # project structure.
 
 # Project target.
-target=android-17
+target=android-18

android/src/com/reecedunn/espeak/CheckVoiceData.java

             if (!haveBaseResources) {
                 unavailableLanguages.add(Locale.ENGLISH.toString());
             }
-            returnResults(Engine.CHECK_VOICE_DATA_MISSING_DATA, dataPath, availableLanguages,
+            returnResults(Engine.CHECK_VOICE_DATA_FAIL, dataPath, availableLanguages,
                           unavailableLanguages);
             return;
         }