Added support for wildcards in .flt filter files. You'll need to quote
them to avoid /* being parsed as a comment initiator, like "seta/*.cpp"
on a line including the quotes.
Added an XSLT filter for listing system driver sources, like
mame -lx | xsltproc scripts/xslt/list-system-sources.xslt
Converted the ci subtarget (which isn't really used much) into a .flt
rather than .lua and .lst files.