added extract signing config script

.travis.yml

@@ -41,6 +41,7 @@ cache:
   - $HOME/.local/opt
 
 before_install:
+  - ./scripts/extract_signing_config.sh
   - ./scripts/install_android_ndk.sh
   - export PATH=$HOME/.local/bin:$PATH
   - pip install -r ./configs/requirements.txt --user

scripts/extract_signing_config.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+if [ -n ${SIGNING_CONFIG} ]; then
+    echo ${SIGNING_CONFIG} | base64 -d | tar zxf -
+    echo 'Extracted signing config'
+fi