If a package is part of a virtual dependency and also listed as a normal

dependency ensure that the dependency is always unconditional. Such a case
happens if for example a package has a build dependency and the build dependency
provides a virtual install dependency of the package.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13877 3c298f89-4303-0410-b956-a3cf2f4a3e73