Update ReferenceOOoMajorMinor to 4.1 for installation sets, too

...and not only for instdir/, as was done in
ab67b79c7469cea7de82b6eb6ca1f690063c069c "set OOo reference version to 4.1 for
incompatible MessageBox changes."

Change-Id: I58931982153e619c678adde6cf01ec461dc0d2f5