0dedb2c selftest: Fix bug of collecting test RPMs from argument

1 file Authored by coiby 3 years ago, Committed by kasong 3 years ago,
    selftest: Fix bug of collecting test RPMs from argument
    
    Currently, TEST_RPMS would be only using the last RPM.
    Append each RPM path to TEST_RPMs instead,
    
    Signed-off-by: Coiby Xu <coxu@redhat.com>
    Acked-by: Kairui Song <kasong@redhat.com>