fix issue on devices running an OS prior to 4.2 when the fallback font file was potential stored in a different location on device.

BUG=chromium:183830
R=scroggo@google.com

Review URL: https://codereview.chromium.org/23621002

git-svn-id: http://skia.googlecode.com/svn/trunk@10972 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed