android_run_skia: fix error check

(SkipBuildbotRuns)
BUG=skia:2313
NOTREECHECKS=True
NOTRY=True
R=borenet@google.com

Author: epoger@google.com

Review URL: https://codereview.chromium.org/204713003

git-svn-id: http://skia.googlecode.com/svn/trunk@13881 2bbb7eff-a529-9590-31e7-b0007b416f81

platform_tools/android/bin/android_run_skia

@@ -42,7 +42,7 @@ fi
 EXIT_CODE=`$ADB ${DEVICE_SERIAL} shell cat ${STATUS_FILENAME}`
 $ADB ${DEVICE_SERIAL} shell rm ${STATUS_FILENAME}
 echo "EXIT_CODE is [${EXIT_CODE}]"
-if [ $'0\r' != ${EXIT_CODE} ]; then
+if [ $'0\r' != "${EXIT_CODE}" ]; then
   exit 1
 fi
 exit 0