add post-boot-powerpc so mkhybrid will work too.

tools/boot/woody/post-boot-powerpc

@@ -0,0 +1,36 @@
+#!/bin/bash
+#
+# post-boot-powerpc 0.1 (C) Daniel Jacobowitz <dan@debian.org>
+#
+# Released under GPL 10 April 2000
+# See the file COPYING for license details
+#
+# Do post-image-building tasks for powerpc, to make CDs bootable.
+#
+# $1 is the CD number
+# $2 is the temporary CD build dir
+# $3 is the image file
+
+set -e
+
+N=$1
+CDROOT=$2
+CDIMAGE=$3
+
+cd $CDROOT/..
+
+# Only disk 1* bootable
+if [ $N != 1 -a $N != 1_NONUS ]; then
+	exit 0
+fi
+
+case "$MKISOFS" in
+    *mkhybrid)
+	hmount $3
+	hattrib -b ":install:powermac"
+	humount $3
+    ;;
+    *mkisofs)
+	exit 0
+    ;;
+esac