Revert of fix swarmbucket infra path

Revert of fix swarmbucket infra path (patchset #3 id:40001 of https://codereview.chromium.org/2477033002/ )

Reason for revert:
Broke build CQ: https://luci-milo.appspot.com/swarming/task/324a5636a5cfdf10/steps/Uncaught_Exception/0/logs/exception/0

Original issue's description:
> fix swarmbucket infra path
> 
> Do not rely on buildbot config which goes up 4 directories. Everything
> should happen in the workdir. Also exclude any project-specific paths.
> 
> This fixes the problem that swarmbucket builds expect git_cache to be in
> /b/git_cache. It should be in the CWD/git_cache. This will fix Windows
> builders.
> 
> R=vadimsh@chromium.org
> BUG=
> 
> Committed: https://chromium.googlesource.com/chromium/tools/depot_tools/+/b8b5aaea9217f0a2e0b9a48bfa6e6fc054d74d23

TBR=vadimsh@chromium.org,nodir@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://chromium.googlesource.com/chromium/tools/depot_tools/+/5da21889e50dd98d60db7dfe6aeb7fbb17f202ae

[martiniss, 2016-11-04 22:51:02]

The CQ bit was checked by martiniss@chromium.org

[martiniss, 2016-11-04 22:51:03]

Created Revert of fix swarmbucket infra path

[commit-bot: I haz the power, 2016-11-04 22:51:09]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-04 22:51:17]

Description was changed from

==========
Revert of fix swarmbucket infra path (patchset #3 id:40001 of
https://codereview.chromium.org/2477033002/ )

Reason for revert:
Broke build CQ:
https://luci-milo.appspot.com/swarming/task/324a5636a5cfdf10/steps/Uncaught_E...

Original issue's description:
> fix swarmbucket infra path
> 
> Do not rely on buildbot config which goes up 4 directories. Everything
> should happen in the workdir. Also exclude any project-specific paths.
> 
> This fixes the problem that swarmbucket builds expect git_cache to be in
> /b/git_cache. It should be in the CWD/git_cache. This will fix Windows
> builders.
> 
> R=vadimsh@chromium.org
> BUG=
> 
> Committed:
https://chromium.googlesource.com/chromium/tools/depot_tools/+/b8b5aaea9217f0...

TBR=vadimsh@chromium.org,nodir@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
==========

to

==========
Revert of fix swarmbucket infra path (patchset #3 id:40001 of
https://codereview.chromium.org/2477033002/ )

Reason for revert:
Broke build CQ:
https://luci-milo.appspot.com/swarming/task/324a5636a5cfdf10/steps/Uncaught_E...

Original issue's description:
> fix swarmbucket infra path
> 
> Do not rely on buildbot config which goes up 4 directories. Everything
> should happen in the workdir. Also exclude any project-specific paths.
> 
> This fixes the problem that swarmbucket builds expect git_cache to be in
> /b/git_cache. It should be in the CWD/git_cache. This will fix Windows
> builders.
> 
> R=vadimsh@chromium.org
> BUG=
> 
> Committed:
https://chromium.googlesource.com/chromium/tools/depot_tools/+/b8b5aaea9217f0...

TBR=vadimsh@chromium.org,nodir@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed:
https://chromium.googlesource.com/chromium/tools/depot_tools/+/5da21889e50dd9...
==========

[commit-bot: I haz the power, 2016-11-04 22:51:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/tools/depot_tools/+/5da21889e50dd9...