give generated test torrents the name of the number of files they have, to produce unique ones
give generated test torrents the name of the number of files they have, to produce unique ones

git-svn-id: 51f496e7cf1b55ee487494d18ee2d308bae7fe77@7738 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda

steeve/libtorrent,steeve/libtorrent,steeve/libtorrent,steeve/libtorrent,steeve/libtorrent,steeve/libtorrent