project-lakitu: Add chronos user

Lakitu will use this chronos user instead of the one in eclass overlay

BUG=b/134778014
TEST=presubmit && validation
RELEASE_NOTE=None

Change-Id: Ic33af8ace6a9c279aa589165bef604b4a94c28a5
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/12710
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Reviewed-by: Roy Yang <royyang@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/project-lakitu/profiles/base/accounts/user/chronos b/project-lakitu/profiles/base/accounts/user/chronos
new file mode 100644
index 0000000..38fb083
--- /dev/null
+++ b/project-lakitu/profiles/base/accounts/user/chronos
@@ -0,0 +1,7 @@
+user:chronos
+password:!
+uid:1000
+gid:1000
+gecos:unused stub account
+home:/dev/null
+shell:/bin/false