Merge libc++/libc++abi license headers fixes into 3.8

[Hans Wennborg via cfe-commits]

On Tue, Jan 19, 2016 at 6:08 PM, Marshall Clow <mclow.lists at gmail.com> wrote:
> On Tue, Jan 19, 2016 at 3:34 PM, Eric Fiselier <eric at efcs.ca> wrote:
>> I would like to merge the following commits into 3.8.
>>
>> 1. r258196 (libc++)
>> 2. r258198 (libc++)
>> 3. r258201 (libc++abi)
>>
>> These commits simply add missing license headers.
>>
>> @Marshall Can you please OK this?
>>
>
> I am fine with this.

Thanks. Eric, please go ahead and merge with the script in
util/release/merge.sh.

Cheers,
Hans