Change Linux sysroot creator scripts to use XZ compression.

Change Linux sysroot creator scripts to use XZ compression.

BUG=623785
Review-Url: https://codereview.chromium.org/2957423003
Cr-Commit-Position: refs/heads/master@{#483274}
Committed: https://chromium.googlesource.com/chromium/src/+/0c79bd9f3abeb572e9ab4751cd12eec1b2c4f2e6

[Lei Zhang, 2017-06-29 00:44:16]

thestig@chromium.org changed reviewers:
+ thomasanderson@chromium.org

[Tom Anderson, 2017-06-29 00:59:29]

lgtm

[Lei Zhang, 2017-06-29 01:22:07]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2017-06-29 01:22:40]

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, 2017-06-29 03:06:10]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498699327384700, "parent_rev":
"a3419787b42ad5b25261e6cb1f8c88a18a22388d", "commit_rev":
"195d9f25389828ee057f9040cbbb4f350b2515c2"}

[commit-bot: I haz the power, 2017-06-29 03:06:24]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498699327384700, "parent_rev":
"7c51fa208052c54c7ec01d97cc353d65468557d7", "commit_rev":
"0c79bd9f3abeb572e9ab4751cd12eec1b2c4f2e6"}

[commit-bot: I haz the power, 2017-06-29 03:06:36]

Description was changed from

==========
Change Linux sysroot creator scripts to use XZ compression.

BUG=623785
==========

to

==========
Change Linux sysroot creator scripts to use XZ compression.

BUG=623785

Review-Url: https://codereview.chromium.org/2957423003
Cr-Commit-Position: refs/heads/master@{#483274}
Committed:
https://chromium.googlesource.com/chromium/src/+/0c79bd9f3abeb572e9ab4751cd12...
==========

[commit-bot: I haz the power, 2017-06-29 03:06:38]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/0c79bd9f3abeb572e9ab4751cd12...