Update version to 5.8

Update version to 5.8

TBR=machenbach@chromium.org, vogelheim@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2641003003 .
Cr-Commit-Position: refs/heads/master@{#42504}
Committed: https://chromium.googlesource.com/v8/v8/+/f09e57923ae9f0b18e63ec4edcec404a7e5862ed

[Michael Hablich, 2017-01-19 13:34:09]

Description was changed from

==========
Update version to 5.8

TBR=machenbach@chromium.org, vogelheim@chromium.org
NOTRY=true
==========

to

==========
Update version to 5.8

TBR=machenbach@chromium.org, vogelheim@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2641003003 .
Cr-Commit-Position: refs/heads/master@{#42504}
Committed:
https://chromium.googlesource.com/v8/v8/+/f09e57923ae9f0b18e63ec4edcec404a7e5...
==========

[Michael Hablich, 2017-01-19 13:34:11]

Committed patchset #1 (id:1) manually as
f09e57923ae9f0b18e63ec4edcec404a7e5862ed (presubmit successful).

[Michael Achenbach, 2017-01-19 13:41:49]

lgtm