vim: install vimdiff symlink for vim-full

vim-full comes with diff feature

Signed-off-by: Sergio E. Nemirowski <sergio@outerface.net>

utils/vim/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=vim
 PKG_VERSION:=8.2
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 VIMVER:=82
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
@@ -221,6 +221,7 @@ define Package/vim-full/install
 	$(INSTALL_DIR) $(1)/usr/bin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/vim_normal $(1)/usr/bin/vim
 	$(INSTALL_DIR) $(1)/usr/share/vim
+	$(LN) vim $(1)/usr/bin/vimdiff
 	$(INSTALL_CONF) ./files/vimrc.full $(1)/usr/share/vim/vimrc
 endef