Bug#740042: linux: The module chromeos_laptop is not enabled in kernel 3.13, needed to enable touchpad on chromebooks

[David Shao <davshao@gmail.com>]

As a workaround, I copied /boot/config-3.13-1-amd64 to
/boot/config-3.13-1-amd64-chrome and added the line

CONFIG_CHROME_PLATFORMS=y

Then at the point in the modified cros-haswell-modules.sh for Debian
where it notices config has changed,
I answered "m".  (Should I have set CONFIG_CHROME_PLATFORMS to m in
the first place?)

I modified cros-haswell-modules.sh for 3.13 following the directions from:

https://wiki.archlinux.org/index.php/Acer_C720_Chromebook

and pulling in the modified /boot/config-3.13-1-amd64-chrome for the config.

Note that the module is built and installed in a new directory
platform/chrome not platform/x86.