fix Jamfile syntax issue

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10570 a83610d8-ad2a-0410-a6ab-fc0612d85776
Jamfile fix

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10571 a83610d8-ad2a-0410-a6ab-fc0612d85776
gcc on windows (mingw) doesn't need -fPIC (in fact, it warns on it)

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10572 a83610d8-ad2a-0410-a6ab-fc0612d85776
fix request log build in clang

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10573 a83610d8-ad2a-0410-a6ab-fc0612d85776
merged changes from RC_1_0

git-svn-id: svn://svn.code.sf.net/p/libtorrent/code@10574 a83610d8-ad2a-0410-a6ab-fc0612d85776