Subject: added if-then to preinstall.sh

Description:

if [ -f /data/data/com.aakash.lab/files/aakash.sh ]; then
    /system/bin/sh /data/data/com.aakash.lab/files/aakash.sh
elif [ -f /data/data/com.example.gkaakash/files/aakash.sh ]; then
    /system/bin/sh /data/data/com.example.gkaakash/files/aakash.sh
elif [ -f /data/local/aakash.sh ]; then
    /system/bin/sh /data/local/aakash.sh
else
    echo "aakash.sh NOT found" > /sdcard/preinstall.log
fi