DEPS.xwalk: Roll ozone-wayland (a5ca2e9 -> 5047b6e)

5047b6e wayland: Fix segfault when trying to set cursor without input
6f22c54 Update RELEASE-NOTES.txt
93c95a0 Update RELEASE-NOTES.txt

The important part is the topmost commit: it fixes a crash that happens
when a mouse is not connected to an IVI device.

BUG=XWALK-1939
Merge pull request #2107 from rakuco/oz-wl-roll

DEPS.xwalk: Roll ozone-wayland (a5ca2e9 -> 5047b6e)