Use "git log" instead of "git svn info" for revision number information, since

Use "git log" instead of "git svn info" for revision number information, since
"git svn info" hangs indefinitely on pure git checkouts.

BUG=
R=blois@google.com

Committed: https://code.google.com/p/dart/source/detail?r=37374

[Emily Fortuna, 2014-06-09 17:45:42]

https://codereview.chromium.org/327563003/diff/1/tools/utils.py
File tools/utils.py (right):

https://codereview.chromium.org/327563003/diff/1/tools/utils.py#newcode373
tools/utils.py:373: stderr = subprocess.STDOUT, shell=IsWindows(), cwd =
DART_DIR)
Yeah, the 100 is gross, but better than hanging indefinitely. I'm happy to
consider other suggestions.

[ricow1, 2014-06-10 10:44:10]

https://codereview.chromium.org/327563003/diff/1/tools/utils.py
File tools/utils.py (right):

https://codereview.chromium.org/327563003/diff/1/tools/utils.py#newcode371
tools/utils.py:371: # number of commits backwards (100) to get past any local
commits.
will this actually give the correct revision?

[Emily Fortuna, 2014-06-10 16:08:48]

https://codereview.chromium.org/327563003/diff/1/tools/utils.py
File tools/utils.py (right):

https://codereview.chromium.org/327563003/diff/1/tools/utils.py#newcode371
tools/utils.py:371: # number of commits backwards (100) to get past any local
commits.
On 2014/06/10 10:44:10, ricow1 wrote:
> will this actually give the correct revision?

Yup, as long as there are no more than 100 local commits

[Emily Fortuna, 2014-06-12 23:08:54]

ping?

[blois, 2014-06-16 19:20:12]

lgtm, would be great to get this fixed up.

https://codereview.chromium.org/327563003/diff/1/tools/utils.py
File tools/utils.py (right):

https://codereview.chromium.org/327563003/diff/1/tools/utils.py#newcode376
tools/utils.py:376: if revision:
Could fall back to git svn info if this fails, just to be safe.

[Emily Fortuna, 2014-06-16 20:13:48]

Committed patchset #2 manually as r37374 (presubmit successful).