CrOS: Update Chromite pin.
CrOS: Update Chromite pin.

New Chromite pin is 1e675ee26f3804e7efcee2b6eb08775a05777537.

TBR=stip@chromium.org
BUG=chrome-os-partner:41532,chromium:498452
TEST=None

Review URL: https://codereview.chromium.org/1201643002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@295774 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build