Fix before_deploy error

Author: agentmilindu

.travis.yml

@@ -50,9 +50,9 @@ matrix:
       script:
         - cd android && ./gradlew assembleDebug && ./gradlew assembleRelease
       before_deploy:
-      - cp $TRAVIS_BUILD_DIR/.keystore $HOME
-      - jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-release-unsigned.apk $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-debug-signed.apk -keystore $HOME/.keystore -storepass $storepass -keypass $keypass
-      - "${ANDROID_HOME}/build-tools/22.0.1/zipalign 4 $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-release-unsigned.apk $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-debug-signed.apk"
+      - cp $TRAVIS_BUILD_DIR/debug.keystore $HOME
+      - jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-release-unsigned.apk androiddebugkey -keystore $HOME/debug.keystore -storepass $storepass -keypass $keypass
+      - "${ANDROID_HOME}/build-tools/23.0.1/zipalign 4 $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-release-unsigned.apk $TRAVIS_BUILD_DIR/android/app/build/outputs/apk/app-debug-signed.apk"
       deploy: # mostly generated by `> travis deploy releases`
         skip_cleanup: true
         provider: releases