make new google-android-emulator package

• base this package off of google-android-ndk-installer
• install into /usr/lib/android-sdk/emulator
• package should be for amd64 only, since the Google binaries are
• provide startup script in /usr/bin/emulator that ensures it finds all the libs, which are referenced using relative paths.

A quick idea of the script:

#!/bin/sh -e

if [ -z "$ANDROID_HOME" ]; then
    export ANDROID_HOME=/usr/lib/android-sdk
fi

export LD_LIBRARY_PATH=$ANDROID_HOME/emulator/lib64:$ANDROID_HOME/emulator/lib64/qt/lib:$LD_LIBRARY_PATH

cd "$ANDROID_HOME/emulator"
./emulator "$@";