Move working VFS modules to source/modules/

(This used to be commit 14b129e301c94ccf47b9105bda1bd9d142feb1b5)

diff --git a/examples/VFS/audit.c b/source3/modules/vfs_audit.c
similarity index 100%
rename from examples/VFS/audit.c
rename to source3/modules/vfs_audit.c

diff --git a/examples/VFS/netatalk.c b/source3/modules/vfs_netatalk.c
similarity index 100%
rename from examples/VFS/netatalk.c
rename to source3/modules/vfs_netatalk.c

diff --git a/examples/VFS/recycle.c b/source3/modules/vfs_recycle.c
similarity index 100%
rename from examples/VFS/recycle.c
rename to source3/modules/vfs_recycle.c