This was mostly sorted already, but put things like
"cache-tree.h" after "cache.h", even though "-" comes before
"." (at least in the C locale). This will make it easier to
keep the list sorted later by piping it through "sort".
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>