chromium-status: use RFC 2822 in the main date status

chromium-status: use RFC 2822 in the main date status

This format is a bit more standard than what we're using atm.
	Before: Sat Nov 02, 17:48 UTC
	After: Sat, 02 Nov 2013 17:48:44 UTC

BUG=chromium:314501
TEST=ran local appengine and checked display
TEST=`./tests/main_test.py` passes

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=234170

[vapier, 2013-11-04 22:38:11]

this is the same as https://codereview.chromium.org/51913003/ but with a fixed
base URL, so a quick lgtm would be nice :)

[scottz, 2013-11-09 04:54:48]

On 2013/11/04 22:38:11, vapier wrote:
> this is the same as https://codereview.chromium.org/51913003/ but with a fixed
> base URL, so a quick lgtm would be nice :)

LGTM

[cmp, 2013-11-10 15:35:20]

lgtm

[commit-bot: I haz the power, 2013-11-10 15:35:29]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/vapier@chromium.org/56023011/1

[commit-bot: I haz the power, 2013-11-10 15:35:33]

Change committed as 234170