package/imagemagick: add prompt for host variant

Sometimes, it is required to call imagemagick from a post-build script
or the likes, so we have to allow the user to enable the host variant
for imagemagick.

Update the linux package to select the host variant now.

Signed-off-by: "Yann E. MORIN" <yann.morin@orange.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
3 files changed