Generate wayland related files even if wayland disabled

Generate wayland related files even if wayland disabled

This fixes the regression caused by commit 883ce46

Making all in debian.upstream
make[2]: Entering directory '/home/uaeoff/Work/workspace/media/build/libva/debian.upstream'
make[2]: *** No rule to make target 'libva-wayland1.install', needed by 'all-am'.  Stop.
make[2]: Leaving directory '/home/uaeoff/Work/workspace/media/build/libva/debian.upstream'
Makefile:453: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/uaeoff/Work/workspace/media/build/libva'
Makefile:384: recipe for target 'all' failed
make: *** [all] Error 2

Reported-by: Eoff, Ullysses A <ullysses.a.eoff@intel.com>
Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>