o unbreak i386-6-exp build of graphics/linux-sdl_image: remove [1]

LINUX_BASE/usr/doc dealing from devel/linux-sdl12
to emulators/linux_base-fc4 -- this directory belongs to the
linux mtree;

o bump PORTREVISION for both ports;
o update emulators/linux_base-fc4 distribution to info-4.8-8.fc4.2

(previous one is not fetchable now).

Reported by: linimon [1]
Approved by: netchild (mentor, implicit)