Effectively a redo of hexops/mach#231 where I messed up the submodule update by accident.
Updates Dawn to latest revision as of 2022-04-18 c7b7b6def6
* Followed https://github.com/hexops/dawn/tree/main/mach#updating
* The UB issue should now actually get fixed (once CI builds the binary releases.)
* Verified example runs on macOS.
Helps hexops/mach#221
Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
In e673e6c5d4 I failed to update the submodule correctly, this
commit fixes that and actually updates us to the latest Dawn revision.
Helps hexops/mach#221
Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
