Fix travis

Author: schwabe

.travis.yml

@@ -47,8 +47,8 @@ before_script:
 
   #- yes | sdkmanager --update
   #- yes | sdkmanager --licenses
-  - yes | sdkmanager 'ndk-bundle' 
-  - yes | sdkmanager 'platforms;android-28'
+  - yes | sdkmanager 'ndk;21.2.6472646'
+  - yes | sdkmanager 'platforms;android-29'
 
   - export PATH=$PATH:${ANDROID_NDK_HOME}