This reduces the required time for the configure step drastically,
from previous:
# time ./configure --with-config=kernel
-> 124.14s user 34.06s system 103% cpu 2:32.90 total
to now:
# time ./configure --with-config=kernel
-> 75.07s user 15.01s system 394% cpu 22.821 total
(152 seconds vs 22 seconds)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
