package/gd: Add explicit support for tiff

This ensures reproducible builds.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gd/gd.mk

@@ -52,6 +52,13 @@ else
 GD_CONF_OPTS += --without-png
 endif
 
+ifeq ($(BR2_PACKAGE_TIFF),y)
+GD_DEPENDENCIES += tiff
+GD_CONF_OPTS += --with-tiff
+else
+GD_CONF_OPTS += --without-tiff
+endif
+
 ifeq ($(BR2_PACKAGE_XLIB_LIBXPM),y)
 GD_DEPENDENCIES += xlib_libXpm
 GD_CONF_OPTS += --with-xpm