The feature to install packages in the target requires to
build the package manager. It would fail, with very obtuse
errors, if a test requires to install something and the
package manager hasn't been build. This will add the package
manager as dependency for testimage.
[YOCTO #10260]
Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
