fix test_web_seed for use in trunk, where tests are run in separate directories
fix test_web_seed for use in trunk, where tests are run in separate directories

git-svn-id: 6ed3528c1be4534134272ad6dd050eeaa1f628d3@8707 f43f7eb3-cfe1-5f9d-1b5f-e45aa6702bda

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