aufs: tiny, extract a part of br_del() and create br_del_file()

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: tiny, specify the exact type for array

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: bugfix, use id instead of index to identify a branch

Since the index of the removing branch may be different from the index
in opened file objects, use the branch id instead.

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
aufs: update the donator list

Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
Merge remote-tracking branch 'aufs3-standalone/aufs3.9/00base' into aufs3.9/10static
Merge branch 'aufs3.9/10static' into aufs3.9/11proc_map
Merge branch 'aufs3.9/11proc_map' into aufs3.9/18public