parselogs: ignore floppy error on qemu-system-x86 at boot stage
We can disable floppy drive by BIOS on a hardware, but an empty floppy
drive is connected by default on qemu-system-x86. Linux usually detect
the device and modprode the matched floppy.ko at the boot stage. Due to
we don't specify a floppy deivce in qemu boot arguments, then the errors
about floppy reading comes out.
It is harmless and normal, so we could ignore this error message on
qemux86.
Seen if kernel-modules is included in the image which pulls in the
relavent kernel module.
