SkQP: fix broken JUnit tests & report output

Switches over to writing output to the sd card.

Change-Id: Ic287a741b9af471f823a7e97eb0c6d3d20f639d6
Reviewed-on: https://skia-review.googlesource.com/96380
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Stephan Altmueller <stephana@google.com>
1 file changed