fixed proguard settings

Author: PiotrBandurskiVA

.circleci/config.yml

@@ -12,7 +12,7 @@ jobs:
           key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
       - run
           name: Create empty local.properties
-          command: touch local.properties
+          command: echo "" > ${HOME}/local.properties
       - run:
           name: Download Dependencies
           command: ./gradlew androidDependencies