Sanitizers: Roll in 16 months of libcxx and libcxxabi changes.

MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f91..aad34a13

libcxxabi:
https://chromium.googlesource.com/chromium/llvm-project/libcxxabi/+log/4ad1009a..9a39e428

BUG=573250
TBR=thestig,glider

Committed: 9341b6512ed64facdefe5d6c26abcf0320728c5e

[Nico, 2015-12-30 18:06:49]

Description was changed from

==========
MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f911...

BUG=573250
==========

to

==========
MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f91....

libcxxabi:
https://chromium.googlesource.com/chromium/llvm-project/libcxxabi/+log/4ad100...

BUG=573250
==========

[Nico, 2015-12-30 18:13:49]

Description was changed from

==========
MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f91....

libcxxabi:
https://chromium.googlesource.com/chromium/llvm-project/libcxxabi/+log/4ad100...

BUG=573250
==========

to

==========
MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f91....

libcxxabi:
https://chromium.googlesource.com/chromium/llvm-project/libcxxabi/+log/4ad100...

BUG=573250
TBR=thestig,glider
==========

[Nico, 2015-12-30 18:14:09]

thakis@chromium.org changed reviewers:
+ glider@chromium.org, thestig@chromium.org

[Nico, 2015-12-30 18:14:09]

First to stamp wins!

[Nico, 2015-12-30 18:15:51]

Description was changed from

==========
MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f91....

libcxxabi:
https://chromium.googlesource.com/chromium/llvm-project/libcxxabi/+log/4ad100...

BUG=573250
TBR=thestig,glider
==========

to

==========
MSan: Roll in 16 months of libcxx and libcxxabi changes.

These two libraries are only used in instrumented builds.  They haven't
been updated since they were added.  Roll them to pick up many warning
fixes and to not fall behind upstream too much.

libcxx:
https://chromium.googlesource.com/chromium/llvm-project/libcxx/+log/48198f91....

libcxxabi:
https://chromium.googlesource.com/chromium/llvm-project/libcxxabi/+log/4ad100...

BUG=573250
TBR=thestig,glider

Committed: 9341b6512ed64facdefe5d6c26abcf0320728c5e
==========

[Nico, 2015-12-30 18:15:52]

Committed patchset #3 (id:40001) manually as
9341b6512ed64facdefe5d6c26abcf0320728c5e (presubmit successful).

[Lei Zhang, 2015-12-30 18:20:59]

lgtm