kern/104389: [geom] [patch] sys/geom/geom_dump.c doesn't encode XML entities

[Eugene Grosbein]

Hi!

This it still the problem for 8.0-RC1 and patch-3 really helps.
Please note, that localized versions of Windows assing to newly formatted
USB flash drives the label "NEW VOLUME" translated to national language.

So, inserting such drive instantly breaks geom utilities until drive removed.

patch-3.diff in the PR solves the problem.

Eugene Grosbein