fix pseudo packages obsoleting other pseudo packages
fix pseudo packages obsoleting other pseudo packages

This was broken with commit #ea033e29, which fixed pseudo packages
obsoleting real packages.

jsilhan/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv,jsilhan/libsolv,JacksonIsaac/libsolv