datarootdir fixes

[Tom Tromey]

>>>>> "Ralf" == Ralf Wildenhues <Ralf.Wildenhues@gmx.de> writes:

Ralf> (Please don't make me upgrade the in-tree readline right now; thanks.)

:-)

Ralf> I've also checked now, the other patches against packages that have an
Ralf> upstream are purely changing code that was src-specific already anyway,
Ralf> or have been removed or fixed already in newer upstream versions.  So I
Ralf> think we are good to go there.

Great, thank you for checking.

Tom