[Buildroot] Adding kmscube support

[Fabio Estevam]

Hi,

I am trying to build kmscube package so that I can test etnaviv from
mesa 17.0.0-rc1.

Here is the quick patch version for adding kmscube:
http://pastebin.com/MVz86aE6

After doing a make I get:

$ make
>>> kmscube be60c2f26fbc79038b246dc9a3b8b5fa2fa1fe54 Configuring
>>> kmscube be60c2f26fbc79038b246dc9a3b8b5fa2fa1fe54 Autoreconfiguring
aclocal: error: couldn't open directory 'm4': No such file or directory
autoreconf: /home/fabio/buildroot/output/host/usr/bin/aclocal failed
with exit status: 1

What is the correct way to fix this?

On the host PC it builds fine by doing:
./autogen.sh
./configure
make
sudo make install

Thanks!

Fabio Estevam