fix root directory permissions

hsh-initroot leaves the chroot's root directory permissions
as 1775 while these should really be 755 at most; let's fix it
(important for both VE and VM images, useful for rescue/livecd
ones as well -- especially those with an installer onboard).

image.in/image-scripts.d/01rootdir

@@ -0,0 +1,6 @@
+#!/bin/sh
+# fixup chroot's toplevel directory permissions (use to become 1775)
+
+chmod 755 /
+
+rm -f /.gitignore

sub.in/stage2/image-scripts.d/01rootdir

@@ -0,0 +1,6 @@
+#!/bin/sh
+# fixup chroot's toplevel directory permissions (use to become 1775)
+
+chmod 755 /
+
+rm -f /.gitignore