AppArmor doesn't warn about nonexistent subprofiles

[Felix Geyer]

The AppArmor parser doesn't display a warning/error about nonexistent subprofiles.

For example it doesn't complain about this profile:

#include <tunables/global>

/usr/local/bin/apparmor-test {
  #include <abstractions/base>

  /usr/local/bin/apparmor-test ixr,

  /usr/local/bin/apparmor-test2 Cxr -> nonexistent_profile,
}

Tested with apparmor 2.7.0-0ubuntu2.