Add licensing info for rcssmin & rjsmin files

Add licensing info for rcssmin & rjsmin files

This is a workaround for licensing problem in  https://codereview.chromium.org/1066903002/

[nduca, 2015-04-08 04:05:28]

can you check the cssmin in third_party/WebKit and see how its readme.chromium
is set up? Presumably they've done something to avoid this... lgtm in case this
is the way to do it, but I seem to recall there might be another easy way --- I
just can't remember how.

[nednguyen, 2015-04-08 04:52:41]

On 2015/04/08 04:05:28, nduca wrote:
> can you check the cssmin in third_party/WebKit and see how its readme.chromium
> is set up? Presumably they've done something to avoid this... lgtm in case
this
> is the way to do it, but I seem to recall there might be another easy way ---
I
> just can't remember how.

third_party/WebKit only rjsmin.py and that files already has the license
properly. 

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[nduca, 2015-04-08 04:56:43]

hmm https://github.com/ndparker/rcssmin seems to have it?

[nduca, 2015-04-08 04:57:15]

if we do make changes, we should update the readme.chromium files to say what
local modifications we make.

lets just remove bench.sh

[nednguyen, 2015-04-08 16:41:47]

On 2015/04/08 04:57:15, nduca wrote:
> if we do make changes, we should update the readme.chromium files to say what
> local modifications we make.
> 
> lets just remove bench.sh

I already "git cl land" this. Will remove those files & add readme.chromium in
the next patch.