Update a couple other references to sunflower that I missed

Update a couple other references to sunflower that I missed

R=nweiz
BUG=

Committed: https://code.google.com/p/dart/source/detail?r=42559

[Siggi Cherem (dart-lang), 2014-12-22 23:53:04]

+ahe - now that sunflower is downloaded via DEPS, the reference to the sample
folder is no longer valid. I updated the URL in `try` to point to the new
location.

[Siggi Cherem (dart-lang), 2014-12-22 23:53:38]

Committed patchset #1 (id:1) manually as 42559 (presubmit successful).

[nweiz, 2015-01-05 19:52:30]

lgtm

https://codereview.chromium.org/825553002/diff/1/site/try/src/samples.dart
File site/try/src/samples.dart (right):

https://codereview.chromium.org/825553002/diff/1/site/try/src/samples.dart#ne...
site/try/src/samples.dart:136:
"https://raw.githubusercontent.com/dart-lang/sample-sunflower/f808fcf68e523ea69631d2e61fd26be3296a1a8f/web/math.png";
long line

[ahe, 2015-01-07 12:09:33]

ahe@google.com changed reviewers:
+ ahe@google.com

[ahe, 2015-01-07 12:09:33]

lgtm

https://codereview.chromium.org/825553002/diff/1/site/try/src/samples.dart
File site/try/src/samples.dart (right):

https://codereview.chromium.org/825553002/diff/1/site/try/src/samples.dart#ne...
site/try/src/samples.dart:136:
"https://raw.githubusercontent.com/dart-lang/sample-sunflower/f808fcf68e523ea69631d2e61fd26be3296a1a8f/web/math.png";
On 2015/01/05 19:52:30, nweiz wrote:
> long line

Don't worry about that. I should copy the PNG file when I build Try Dart. I'm
tracking that in https://code.google.com/p/dart/issues/detail?id=22006.