qtbase: fix compile for qmake

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
qtbase: since we build qmake manually there is no need for qmake target

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
qtbase: do not remove qtbase - it is now the cross compiled version

Before the previous fixes qmake was a symlink to native qmake which caused
trouble during packing.

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>