vim: add host variant

Vim contains a tool called xxd, which is needed by mediastreamer on
the host as part of its build process. Therefore, this commit
introduces a host variant for the vim package, that will be used by
mediastreamer.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/vim/vim.mk

@@ -75,4 +75,7 @@ VIM_POST_INSTALL_TARGET_HOOKS += VIM_INSTALL_RUNTIME_CMDS
 VIM_POST_INSTALL_TARGET_HOOKS += VIM_REMOVE_DOCS
 endif
 
+HOST_VIM_DEPENDENCIES = host-ncurses
+
 $(eval $(autotools-package))
+$(eval $(host-autotools-package))