Rebaseline HD7770 GMs for https://codereview.chromium.org/811133002.

TBR=bensong@google.com

Review URL: https://codereview.chromium.org/808173004
version 0 of imgconv tool

BUG=skia:

Review URL: https://codereview.chromium.org/809143002
rebaseline after perspective/conic fix

BUG=skia:
TBR=
NOTRY=True

Review URL: https://codereview.chromium.org/816543002
Add Coverage Drawing XP

BUG=skia:

Review URL: https://codereview.chromium.org/808813002
Stop creating GrODS for stencilPath commands.

Review URL: https://codereview.chromium.org/816513003