new_variant: fix private yaml path for hatch

The private overlay directory for Hatch was renamed in CL*4111775,
which broke new_variant support for Hatch. Update the path.

BUG=b:197038156
TEST=`new_variant_fulltest.sh hatch && echo PASS`

Cq-Depend: chrome-internal:4111775
Change-Id: I697df9e6e88cb51b26dbaa7e8de2be2de1faa56c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/3153692
Tested-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Paul Fagerburg <pfagerburg@chromium.org>
1 file changed