aufs: for linux-3.15, support for a new param for vfs_rename

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
Merge branch 'aufs3.x-rcN/00base' into aufs3.x-rcN/01modular
Merge branch 'aufs3.x-rcN/01modular' into aufs3.x-rcN/30stdalone
Merge branch 'aufs3.x-rcN/30stdalone' into aufs3.x-rcN/39public
aufs3.x-rcN 20140414

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>