Full install if about 5.6G, so increase the default image size

src/freedombone-image

 VMDEBOOTSTRAP_REPO=git://git.liw.fi/vmdebootstrap
 VMDEBOOTSTRAP_VERSION=0.8
 MAKEFILE=${PROJECT_NAME}-image-makefile
-IMAGE_SIZE=4G
+IMAGE_SIZE=8G
 IMAGE_NAME='full'
 
 USERNAME=$(echo $USER)