kvm tools, x86: Drop unneeded sections in rom building script

Otherwise overlaps might happen (and actually having anything but .text
here at moment make no sense) and it triggers the following error on
Golden ld

 # ld: error: load segment overlap [0x0 -> 0x38c] and [0x0 -> 0x0]

Reported-and-tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>