Processed: set severity to be less misleading

[Debian Bug Tracking System]

Processing commands for control at bugs.debian.org:

> # missing text is a major usability problem, making the
> # package not suitable for release, but does not prevent
> # using the bootloader
> severity 564844 serious
Bug #564844 [grub-pc] grub-pc: Fonts don't show in the new graphical boot menu
Severity set to 'serious' from 'grave'

> kthxbye
Stopping processing here.

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Debian bug tracking system administrator
(administrator, Debian Bugs database)