vim-7.2: provide correct VIMGUI option (unbreaks build)

vim-7.2: provide correct VIMGUI option (unbreaks build)

vim-7.2.bb sports VIMGUI="none", resulting in "--enable-gui=none". Vim
configure, however, does not know about this option, does not understand
that we don't want any X support, and tries to link libSM and possibly
libXpm when building. This breaks the build for systems without X.

The patch changes VIMGUI to VIMGUI="no", as "--enable-gui=no" is
understood by Vim configure, and behaves as expected.

Signed-off-by: Thilo Fromm <t.fromm@dresearch.de>
Signed-off-by: Khem Raj <raj.khem@gmail.com>