[Libreoffice] iOS and convert to PDF

[Tor Lillqvist]

> Entering /Users/brians/develop/libreOffice/libo/l10ntools/source

Ah OK, l10ntools. That is a module it shouldn't even be building for
non-desktop OSes. It contains some command-line tools that make no
sense on iOS (or Android). No libraries that actual LO code would use
are built in l10ntools as far as I know.

I see that in tail_build/prj/build.lst l10ntools wasn't prefixed with
DESKTOP. Fixing that.

--tml