Android build tools version updated in Travis CI config

Author: yvolk

.travis.yml

@@ -7,7 +7,7 @@ sudo: required
 env:
   global:
     - COMPILE_API_LEVEL=25
-    - ANDROID_BUILD_TOOLS_VERSION=25.0.2
+    - ANDROID_BUILD_TOOLS_VERSION=25.0.3
     # Using Emulator for an older Android version, because there is no newer emulator, which works in travis-ci
     - EMULATOR_API_LEVEL=24
     - EMULATOR_ABI=armeabi-v7a