[PATCH] docbook build fix
Fix documentation build with `make O='
Cc: Martin Waitz <tali@admingilde.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
authored by Jiri Slaby and committed by Linus Torvalds 597f6eea c988d2b2