[app][sample] Update rules.mk for skel,skel2 apps

No need to declare USER_TASK anymore.
Add explicit dependency on app/trusty.

Change-Id: I14258bfff50173ceec3a013e958d33b7c0774d01
2 files changed
tree: 3bf2e5aeece6ceb25dead8e48fbe4db1470ae441
  1. skel/
  2. skel2/