Add /dev directory which was erronously removed from Linux chroots.
Make pseudo random data inside chroot for platforms that lack it.
Disable parallel builds for deps, since not all of them support it.
Make MAKEFLAGS and LD_ALTEXEC inheritable in the chroot environment.
Put full path to make in MAKE variable.

Otherwise we risk that later assignments to the PATH variable changes
the version we use.
Merge pull request #8 from kacfengine/chroot_fixes

Chroot fixes