extract ndk shows no output, because of travis limitations

Author: plamen5kov

.travis.yml

@@ -32,7 +32,7 @@ before_install:
   - git submodule update --init --recursive
   - wget http://dl.google.com/android/repository/android-ndk-$NDK_VERSION-linux-x86_64.zip
   - chmod +x android-ndk-$NDK_VERSION-linux-x86_64.zip
-  - "unzip android-ndk-$NDK_VERSION-linux-x86_64.zip | egrep -v ^Extracting"
+  - "unzip -q android-ndk-$NDK_VERSION-linux-x86_64.zip"
   - export ANDROID_NDK_HOME=`pwd`/android-ndk-$NDK_VERSION
   - export PATH=${PATH}:${ANDROID_NDK_HOME}
 before_script: