create utils project with shared files

https://issues.adblockplus.org/ticket/1050

create utils project with shared files

Previously they were included into each project.

Some benefits from it:
- DRY, it's already used by AdblockPlus, AdblockplusEngine and by tests
- Less compilation time.
- Theoretically it can happen that in tests there are some defines which change the code. Linking the same library we have the tested code.
- No repeating - less disorder.
- Also one have to be sure that it's compilable in all projects instead of in only one.

[Felix Dahlke, 2014-07-16 15:17:19]

I agree, makes a lot of sense. Just one comment.

http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
File adblockplus.gyp (right):

http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
adblockplus.gyp:34: 'target_name': 'utils',
I'd vote for calling this "shared", like the directory this is in.

[Oleksandr, 2014-07-16 15:28:06]

LGTM
On 2014/07/16 15:17:19, Felix H. Dahlke wrote:
> I agree, makes a lot of sense. Just one comment.
> 
>
http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
> File adblockplus.gyp (right):
> 
>
http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
> adblockplus.gyp:34: 'target_name': 'utils',
> I'd vote for calling this "shared", like the directory this is in.

[sergei, 2014-07-16 15:50:17]

http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
File adblockplus.gyp (right):

http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
adblockplus.gyp:34: 'target_name': 'utils',
On 2014/07/16 15:17:19, Felix H. Dahlke wrote:
> I'd vote for calling this "shared", like the directory this is in.
Would it have more semantically sense to rename the directory to "utils"?

[Felix Dahlke, 2014-07-16 16:12:28]

On 2014/07/16 15:50:17, sergei wrote:
>
http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
> File adblockplus.gyp (right):
> 
>
http://codereview.adblockplus.org/5979045791531008/diff/5629499534213120/adbl...
> adblockplus.gyp:34: 'target_name': 'utils',
> On 2014/07/16 15:17:19, Felix H. Dahlke wrote:
> > I'd vote for calling this "shared", like the directory this is in.
> Would it have more semantically sense to rename the directory to "utils"?

IMO, shared makes it more obvious that both engine and plugin use that code.
Plus the stuff in there isn't as general purpose as utils would suggest.

[Felix Dahlke, 2014-07-16 16:36:44]

LGTM!