make fs/{namespace,super}.c forget about acct.h

These externs belong in fs/internal.h.  Rename (they are not acct-specific
anymore) and move them over there.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc fs/fs_pin.c
Simple merge

diff --cc fs/internal.h
Simple merge

diff --cc fs/namespace.c
Simple merge

diff --cc fs/super.c
Simple merge

diff --cc include/linux/acct.h
Simple merge