Roll DEPS to get cros chrome-sdk support for external boards.

BUG=chromium:236500
TEST=Try building Chrome with --board=x86-generic

Review URL: https://codereview.chromium.org/99473003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238876 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238877 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238877