component updater: set EVN major 760 for crostini

BUG=chromium:956284
TEST=none

Change-Id: I01ff6072088c91ff3596cbc4ba65b2dbb47bba5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1583180
Auto-Submit: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Xiaochu Liu <xiaochu@chromium.org>
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654002}
1 file changed