merged test fix from RC_0_16

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@8705 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix test_ssl for trunk, where tests are run in separate directories

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@8706 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix test_web_seed for use in trunk, where tests are run in separate directories

git-svn-id: https://svn.code.sf.net/p/libtorrent/code/trunk@8707 a83610d8-ad2a-0410-a6ab-fc0612d85776