JFFS2: avoid using C++ keyword `new' in userspace-visible header

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14995



Reported-by: R. Diez <rdiezmail-kernelbugzilla@yahoo.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>