vimrc: prefix the clipboard value
vimrc: prefix the clipboard value

Prefix the clipboard with the unnamed space ALWAYS.  When it's
available, add in the unnamedplus in front.

Signed-off-by: Dan Kalowsky <5fb29269e90e7f59540525cea3545f89343cfd4f@amperecomputing.com>

dkalowsk/dotfiles,dkalowsk/dotfiles