Update git cl try command to mention tryserver.chromium.linux.

Update git cl try command to mention tryserver.chromium.linux.

This is a purely cosmetic CL.

R=agable@chromium.org
BUG=395196
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=286230

[agable, 2014-07-24 18:36:49]

On 2014/07/24 00:42:10, Sergey Berezin wrote:

lgtm, but don't land until after the split actually lands and isn't reverted.

[James Cook, 2014-07-25 16:27:40]

https://codereview.chromium.org/415903002/diff/1/git_cl.py
File git_cl.py (right):

https://codereview.chromium.org/415903002/diff/1/git_cl.py#newcode2296
git_cl.py:2296: 'tryserver master, e.g. "-m tryserver.chromium.linux".')
drive-by: Can this list the names of all the available tryservers? I rely on
this error message to figure out the correct choice.

[iannucci, 2014-07-25 17:31:17]

On 2014/07/25 16:27:40, James Cook wrote:
> https://codereview.chromium.org/415903002/diff/1/git_cl.py
> File git_cl.py (right):
> 
> https://codereview.chromium.org/415903002/diff/1/git_cl.py#newcode2296
> git_cl.py:2296: 'tryserver master, e.g. "-m tryserver.chromium.linux".')
> drive-by: Can this list the names of all the available tryservers? I rely on
> this error message to figure out the correct choice.

Even better would be a full list of masters/builders (like the rietveld
popdown). I'm not sure how to do this quickly without checking it in somewhere
or having some sort of caching mechanism (but I'm not sure what to key the cache
invalidation off of).

[Sergey Berezin, 2014-07-25 17:42:51]

On 2014/07/25 16:27:40, James Cook wrote:
> https://codereview.chromium.org/415903002/diff/1/git_cl.py
> File git_cl.py (right):
> 
> https://codereview.chromium.org/415903002/diff/1/git_cl.py#newcode2296
> git_cl.py:2296: 'tryserver master, e.g. "-m tryserver.chromium.linux".')
> drive-by: Can this list the names of all the available tryservers? I rely on
> this error message to figure out the correct choice.

Since I also modified PRESUBMIT.py (see
https://codereview.chromium.org/415323002/), there is already code to figure out
the correct master for a given bot. I think the right fix would be to make 'git
cl try' figure out the master automatically using PRESUBMIT logic. But, of
course, not in this CL. 

I filed a bug http://crbug.com/397592, thanks for raising the issue.

[Sergey Berezin, 2014-07-29 17:14:22]

The CQ bit was checked by sergeyberezin@chromium.org

[commit-bot: I haz the power, 2014-07-29 17:15:25]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sergeyberezin@chromium.org/415903002/1

[commit-bot: I haz the power, 2014-07-29 17:17:22]

Change committed as 286230