Add target to make a flashable su addon
Run 'make addonsu' to make a flashable zip to install the addon and
'make addonsu-remove' for a flashable zip that removes it.
Change-Id: I5b2fe67f98f2474b923c074dc6025b47c6db2ae0
diff --git a/addonsu/mount-system.sh b/addonsu/mount-system.sh
new file mode 100644
index 0000000..2e209fb
--- /dev/null
+++ b/addonsu/mount-system.sh
@@ -0,0 +1,13 @@
+#!/sbin/sh
+
+if mount /system; then
+ exit 0
+fi
+
+# Try to get the block from /etc/recovery.fstab
+block=`cat /etc/recovery.fstab | cut -d '#' -f 1 | grep /system | grep -o '/dev/[^ ]*' | head -1`
+if [ -n "$block" ] && mount $block /system; then
+ exit 0
+fi
+
+exit 1