fixed runner script

Author: James Tacker

runner.sh

@@ -1,6 +1,7 @@
+#!/bin/bash
 ./sauce-runner-virtual-0.1.1-linux/bin/sauce-runner-virtual \
--u $SAUCE_USERNAME \
--k $SAUCE_ACCESS_KEY \
+-u "$SAUCE_USERNAME" \
+-k "$SAUCE_ACCESS_KEY" \
 -f espresso \
 -a ./android/app/build/outputs/apk/release/app-release.apk \
 -t ./android/app/build/outputs/apk/androidTest/debug/app-debug-androidTest.apk \