main/device-qemu-*: add crc32c_generic into initfs
This adds the crc32c_generic module into the initfs. Without this, mounting the boot partition will fail.
Mount boot partition (/dev/vda1) to /boot (read-only)
[ 1.376399] EXT4-fs (vda1): Cannot load crc32c driver.
[ 1.411014] EXT4-fs (vda1): Cannot load crc32c driver.
mount: mounting /dev/vda1 on /boot failed: No such file or directory
ERROR: initramfs-extra not found!
See also !2693 (merged).