Adding new comment-matching regex to help license check with assembly files.

Adding new comment-matching regex to help license check with assembly files.

For example:
- third_party/ffmpeg/libavcodec/arm/hpeldsp_arm.S
- third_party/ffmpeg/libavcodec/x86/xvididct.asm

Committed: https://crrev.com/4c74623e0c48f641e33f832aadf114257f8e87ca
Cr-Commit-Position: refs/heads/master@{#329775}

[chcunningham, 2015-05-12 21:40:54]

chcunningham@chromium.org changed reviewers:
+ phajdan.jr@chromium.org

[chcunningham, 2015-05-12 21:42:32]

Hi Paweł,

This changes comes from my work to audit ffmpeg, where have various assembly
files with license headers. I've re-run the checklicense.py script over all of
chromium and found that everything still passes. This just reduces the number of
UNKNOWNS in the ffmpeg directory. 

Thanks,
Chris

[Paweł Hajdan Jr., 2015-05-13 16:03:21]

LGTM

[chcunningham, 2015-05-14 01:14:44]

The CQ bit was checked by chcunningham@chromium.org

[commit-bot: I haz the power, 2015-05-14 01:16:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1135243005/20001

[commit-bot: I haz the power, 2015-05-14 01:40:08]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-14 01:40:43]

Patchset 2 (id:??) landed as
https://crrev.com/4c74623e0c48f641e33f832aadf114257f8e87ca
Cr-Commit-Position: refs/heads/master@{#329775}