gosh: fix ambiguous info message
gosh: fix ambiguous info message

I started gosh for the first time and was greeted with

"This will only work with a working framebuffer for now"

and I wasn't sure if it meant that the shell altogether would only work
with a framebuffer.

Signed-off-by: Chris Koch <cd2178739c1fb8f241acc6c7bd5abe02c150d7e5@google.com>

u-root/u-root,u-root/u-root,u-root/u-root