roll clang 153589:154450

roll clang 153589:154450

Interesting changes in this range:
* The tooling infrastructure landed. Not observable, but it makes it easier
to write clang tools.
* Honor -fno-pic, pie support
* Better diagnostics for several c++11 features
* Cross-compiler changes that hopefully make CrOs clang builds simpler
* Many LTO fixes

Also pick up a minor change to the style plugin: Instead of ignoring
problems below out/, it now ignores them below gen/ and geni/. This
should make it work better with custom build directories.

BUG=none
TEST=none
TBR=mark

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=132350

[Nico, 2012-04-14 20:24:48]

I'll TBR this, so that if there are any obvious issues they'll hopefully become
obvious before monday.

I downloaded both mac and linux tgz files, checked the buildlog in there that
there were no local diffs and that all tests pass, and went through the svn log
of all revisions in the range.

[commit-bot: I haz the power, 2012-04-14 20:25:29]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/10081013/4001

[commit-bot: I haz the power, 2012-04-14 22:09:21]

Try job failure for 10081013-4001 (retry) on win_rel for step "base_unittests".
It's a second try, previously, step "base_unittests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2012-04-14 22:52:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thakis@chromium.org/10081013/4001

[commit-bot: I haz the power, 2012-04-15 00:16:24]

Change committed as 132350

[Mark Mentovai, 2012-04-16 15:05:51]

LGTM