arm64make script - fix error preventing Release testing.

R=scroggo@google.com, djsollen@google.com

Author: halcanary@google.com

Review URL: https://codereview.chromium.org/258323002

git-svn-id: http://skia.googlecode.com/svn/trunk@14730 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed