libmnl: explicitly disable doxygen
libmnl autoconf autodetects doxygen to generate manpages.
If doxygen is provided via hosttools, the build fails.
Also until now manpages were not needed.
So explicitly disable doxygen in configure step.
(From OE-Core rev: 8d7bbf4d6936d831e341e9443a6b3711be09c7ab)
Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Peter Marko