Revert "dblink.mergeme(): Merge files in alphabetic order."

This reverts commit 1d4ac47c28706094230cb2c4e6ee1c1c71629aa0.
As discussed on the gentoo-portage-dev mailing list, if we don't have
a compelling reason to sort here then it's just a waste:

http://archives.gentoo.org/gentoo-portage-dev/msg_67b08fcd7a1b832b347caf1b19362cbb.xml
1 file changed