Added instructions for chroot creation

Chizi123

2019-07-14 3034241fe2f3d7b7b22bc91dc1a03b4fca21472a

 build_packages.sh

old mode 100644
new mode 100755
@@ -3,3 +3,4 @@
CHDIR=$(dirname "$(realpath $0)")/chroot
mount --bind $CHDIR $CHDIR
$CHDIR/bin/arch-chroot $CHDIR su joel -c "/build/repo/build.sh"
umount $CHDIR