Here we simply build piegen tool which gonna be used
to generate parasite code safe to rellocate. The tool
is taking object file as an argument, parses it and
generates C file with rellocations encoded in form
suitable for fast appliance.

Currently only x86-32 x86-64 is supported.

v2 (by ldufour@):
 - Filter PIEGEN
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>