sigrok-cross-android: Redirect SR(D) logs to Android log in PV
sigrok-cross-android: Use Java glue for PV from github
sigrok-cross-android: Use /sdcard/sigrok-firmware for firmwares
sigrok-cross-android: Bump Qt version to 5.3
sigrok-cross-android: Restrict Python assets to .py files
sigrok-cross-android: Remove unused variable ANDROID_BUILD_TOOLS