travis: specify android version

.travis.yml

@@ -71,6 +71,8 @@ jobs:
       cache: ccache
       os: linux
       dist: xenial
+      language: java # we want xenial, so just java, not android
+      jdk: openjdk8
       before_script:
         - sh scripts/travis_common_deps.sh
         - sh scripts/travis_android_deps.sh

scripts/travis_android_deps.sh

@@ -11,10 +11,10 @@ wget https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip -qO sd
 
 echo "Unpack Android SDK"
 unzip sdk.zip > /dev/null 2>/dev/null || exit 1
+cd $TRAVIS_BUILD_DIR
 
 echo "Download all needed tools and NDK"
-cd tools/bin || exit 1
-./sdkmanager --install build-tools\;29.0.1 platform-tools platforms\;android-19 ndk-bundle
+sdk/tools/bin/sdkmanager --install build-tools\;29.0.1 platform-tools platforms\;android-19 ndk-bundle
 
 echo "Download Xash3D FWGS Android source"
 git clone --depth 1 https://github.com/FWGS/xash3d-android-project -b waf android || exit 1