buildroot

sysprof: New package.

[thomas.petazzoni@free-electrons.com:
 - add dependencies on the supported architectures to avoid build
   failures on ARM and other unsupported arches
 - add a patch that removes an useless warning about the kernel
   version. This patch is present upstream. However since it modifies
   configure.ac, we need to autoreconf the package.]

Signed-off-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>