updated mainline version to support bridge

This version of the mainline kernel supports the bridge and vlan learning examples (i.e. the additional APIs). Will allow new users to run all examples provided.

INSTALL.md

@@ -4,9 +4,9 @@ Install a 4.2+ kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline,
 for example:
 
 ```bash
-VER=4.2.0-040200
-REL=201508301530
-PREFIX=http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-unstable
+VER=4.2.0-999
+REL=201509072200
+PREFIX=http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2015-09-08-unstable/
 wget ${PREFIX}/linux-headers-${VER}-generic_${VER}.${REL}_amd64.deb
 wget ${PREFIX}/linux-headers-${VER}_${VER}.${REL}_all.deb
 wget ${PREFIX}/linux-image-${VER}-generic_${VER}.${REL}_amd64.deb