Clone NDK for Travis

.travis.yml

@@ -13,10 +13,11 @@ android:
   licenses:
   - android-sdk-license-.+
 before_install:
-- openssl aes-256-cbc -K $encrypted_e56be693d4fd_key -iv $encrypted_e56be693d4fd_iv
-  -in "$PWD/.travis/secrets.tar.enc" -out secrets.tar -d
+- openssl aes-256-cbc -K $encrypted_e56be693d4fd_key -iv $encrypted_e56be693d4fd_iv -in "$PWD/.travis/secrets.tar.enc" -out secrets.tar -d
 - tar xf secrets.tar
 - mv debug.keystore "$HOME/.android"
+- git clone https://github.com/urho3d/android-ndk.git $HOME/android-ndk-root
+- export ANDROID_NDK_HOME=$HOME/android-ndk-root
 - mkdir "$ANDROID_HOME/licenses" || true
 - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55" > "$ANDROID_HOME/licenses/android-sdk-license"
 - echo -e "\n84831b9409646a918e30573bab4c9c91346d8abd" > "$ANDROID_HOME/licenses/android-sdk-preview-license"