Console colors are too dark - fixed

I've just fixed that.  Turned out there were two bugs playing along:
r/g/b positions within pixel where not passed correctly to rasops, and
the endianness of the pixel accesses was not set correctly either.
That resulted in bits messed up in such a way, that the "white" color
was actually "#381830" - i.e. something in the very dark gray20 area.

Committed to current.  I'll request pull-up to 3.0 after people have
chance to test it on other hpc* ports.

SY, Uwe
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