Fix RecreateSKPs bot (again)

It's killing its own process...

BUG=skia:3008
TBR=rmistry
NOTRY=true

Review URL: https://codereview.chromium.org/661203002
bug_chomper: Cleanup template initialization.

Use the same tricks used by webtry and perf. Code seems more robust and
easier to check for errors this way.

BUG=None
TEST=./run_server.sh, then navigate to 127.0.0.1:8000 and
127.0.0.1:8000/res
R=borenet@google.com

Review URL: https://codereview.chromium.org/661613004
Fix DMWriteTask to write PDF files correctly

Previously, it was not rewinding the asset.

Review URL: https://codereview.chromium.org/659793004
Update SKP version

Automatic commit by the RecreateSKPs bot.

TBR=

Review URL: https://codereview.chromium.org/647973003