The open modules load GSP firmware (nvidia/<ver>/gsp_*.bin) early from the
initramfs. On a fresh install the initramfs is regenerated before that
firmware is on disk, so the first boot fails with
"gsp_*.bin failed with error -2" until a manual "dracut -f".
Add a %posttrans that rebuilds the initramfs after every payload in the
transaction has landed, guaranteeing the firmware is captured. Gate it to
the initial install with a %ghost stamp file, since $1 cannot distinguish
install from upgrade in %posttrans.
