Commit 841c695468 (libdrm: change to meson build system) converted the
autotools --disable-manpages to the neson -Dmanpages=false. However, the
actual option is 'man-pages':
WARNING: Unknown options: "manpages"
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
[yann.morin.1998@free.fr: tweak commit log as per Peter's review]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
56fd68b688