mkdir /dev before doing mknod

Docker-DCO-1.1-Signed-off-by: Lewis Peckover <lew@lew.io> (github: lewispeckover)

contrib/mkimage-yum.sh

@@ -45,6 +45,7 @@ target=$(mktemp -d --tmpdir $(basename $0).XXXXXX)
 
 set -x
 
+mkdir -m 755 "$target"/dev
 mknod -m 600 "$target"/dev/console c 5 1
 mknod -m 600 "$target"/dev/initctl p
 mknod -m 666 "$target"/dev/full c 1 7