File baselibs.conf of Package libqt5-qtx11extras.openSUSE_Leap_42.1_Update
libQt5X11Extras5 libqt5-qtx11extras-devel requires "libQt5X11Extras5-<targettype> = <version>"
libQt5X11Extras5 libqt5-qtx11extras-devel requires "libQt5X11Extras5-<targettype> = <version>"