Revert of Roll Clang 223108:230631 (+revert of r229678)

Revert of Roll Clang 223108:230631 (+revert of r229678) (patchset #5 id:80001 of https://codereview.chromium.org/959443002/)

Reason for revert:
Linux Chrome build is broken: http://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux%20x64/builds/56230

Original issue's description:
> Roll Clang 223108:230631 (+revert of r229678)
>
> Also introduce a build number in the package name, stop versioning
> the Blink GC plugin, and remove repackage.sh.
>
> BUG=444089
> TBR=jln, jbauman
> NOPRESUBMIT=true
>
> Committed: https://crrev.com/b8be3a268134f32d667b42ea60a27c0084063873
> Cr-Commit-Position: refs/heads/master@{#318610}

TBR=thakis@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=444089
Committed: https://crrev.com/b38adbcfb38e56ef02f4fd6c3ec0f7c1d2a279d2
Cr-Commit-Position: refs/heads/master@{#318613}

[hans, 2015-03-01 02:25:27]

Created Revert of Roll Clang 223108:230631 (+revert of r229678)

[commit-bot: I haz the power, 2015-03-01 02:27:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/970623002/1

[commit-bot: I haz the power, 2015-03-01 02:27:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-01 02:28:39]

Patchset 1 (id:??) landed as
https://crrev.com/b38adbcfb38e56ef02f4fd6c3ec0f7c1d2a279d2
Cr-Commit-Position: refs/heads/master@{#318613}

[Nico, 2015-03-01 06:11:32]

lgtm

I suppose the silver lining is that we only found the one thing we already knew
about and nothing else :-/