libvips: update to 7.38.5

DISCLAIMER: thrashed CXX -> C patch
and added libstdc++ dependency

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>
dmapd: update to dmapd 0.0.70

newer versions seem to require newer libvips (7.38.5)
add dependency on libcheck (check)

Signed-off-by: Dirk Neukirchen <dirkneukirchen@web.de>