Add comment to network start script

Author: Dees-Troy

recovery/root/sbin/network_start.sh

@@ -1,4 +1,8 @@
 #!/sbin/sh
+# this was kanged from /system/etc/init.goldfish.sh
+# we run it in the init.rc and it is required to get
+# the network running in order for adb to work in
+# emulator
 
 # Setup networking when boot starts
 ifconfig eth0 10.0.2.15 netmask 255.255.255.0 up