uicmoc3-native: convert to new style staging, remove 'do_stage()'

uicmoc3-native: convert to new style staging, remove 'do_stage()'

* Rename do_stage function name and set the new name as do_install.
* Replace OE_QMAKE_INCDIR_QT with ${D}${includedir}/qte3/include, OE_QMAKE_LIBDIR_QT with ${D}${libdir}/qte3/lib, OE_QMAKE_MOC with ${D}${bindir}/moc3, OE_QMAKE_UIC with ${D}${bindir}/uic3, OE_QMAKE_LIBDIR_QT with ${D}${libdir}/qte3/lib. These variables are exported in qt3e.bbclass.
* Add NATIVE_INSTALL_WORKS = "1"
* bump PR = "r4"

Signed-off-by: Noor Ahsan <noor_ahsan@mentor.com>