Disable vim automatic visual mode on mouse select

when mouse select, vim automatically turns into
visual mode, this is not convienent when copy
and paste in vim with mouse select.

Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>

lfs/vim

@@ -83,6 +83,8 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 
 	ln -svf vim /usr/bin/vi
 	install -m 644 $(DIR_SRC)/config/vim/vimrc /etc/vimrc
+	touch /root/.vimrc
+	echo "set mouse-=a" >> /root/.vimrc
 
 	@rm -rf $(DIR_APP)
 	@$(POSTBUILD)