DEPS.xwalk: Roll ozone-wayland (8f3a1b5 -> 6379cd1).

6379cd1 Move XKB handling to BrowserProcess.
f45c410 DisplayPollThread: Handle EpollCreation calls during construction phase.
5430cf4 Initialize CursorData before Sandbox is enabled.

BUG=XWALK-2789
Merge pull request #2651 from rakuco/roll-deps-oz-wl

DEPS.xwalk: Roll ozone-wayland (8f3a1b5 -> 6379cd1).