turned gpu on for arm emulator

Author: hiteshsondhi88

.travis.yml

@@ -15,7 +15,7 @@ android:
 before_install:
   - echo no | android create avd -c 50M --force -n testarm -t android-16 --abi armeabi-v7a
   - echo no | android create avd -c 50M --force -n testx86 -t android-16 --abi x86
-  - emulator -avd testarm -no-skin -no-audio -no-window &
+  - emulator -avd testarm -no-skin -no-audio -no-window -gpu on &
   - emulator -avd testx86 -no-skin -no-audio -no-window -gpu on &
 
 before_script: