user/clucene: tell check to use $builddir/tmp instead of tmp

If we use /tmp (the default), successive runs of check will usually fail
because /tmp is not cleared on each run, and clucene is not smart enough
to delete its test files on its own, so a whole bunch of tests will
fail. Instead, tell it to use $builddir/tmp, which we can safely clear
each time we run check.

See merge request !49

user/acpilight: fix license, change URL, upgrade to 1.1



See merge request !47

user/cups-filters: upgrade to 1.21.2



See merge request !46

crashes on mouseover of tooltip, completely unstable

If we use /tmp (the default), successive runs of check will usually fail
because /tmp is not cleared on each run, and clucene is not smart enough
to delete its test files on its own, so a whole bunch of tests will
fail. Instead, tell it to use $builddir/tmp, which we can safely clear
each time we run check.