When running the build-image commmand linuxptp gets installed
first which satisfy the time-daemon virtual dependency before
ntp gets installed. As a result the ISO build will fail because
of the conflicted linuxptp package.
Test Plan
Pass: build test
Pass: install image
Pass: boot up on qemu
Story: 2009221
Task: 44053
Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: Id18aa5fb23d0fb8a5aa3582aed711dbed1339075