More setup.hint font adjustments

[Jon TURNEY]

I've adjusted the setup.hint for a few packages to more accurately reflect the 
fonts they require, notes on which I've been collecting at [1]

xedit: remove dependency on dpi100 versions of several font packages
xman: change to depend on dpi75 not dpi100 versions of font-adobe and font-bh
gvim: add dependency on font-adobe-dpi75, it's default font
ddd: add dependency on font-bh-lucidatypewriter-dpi75, it's default font

[1] http://sourceware.org/bugzilla/show_bug.cgi?id=9761