package/qt5/qt5base: add zstd optional dependency

zstd is an optional dependency which is enabled by default since version
5.13.0 and
https://github.com/qt/qtbase/commit/f25bc30d8d9d13fffd34213dfbf5e7373a18222a

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/qt5/qt5base/qt5base.mk

@@ -116,6 +116,13 @@ else
 QT5BASE_CONFIGURE_OPTS += -no-cups
 endif
 
+ifeq ($(BR2_PACKAGE_ZSTD),y)
+QT5BASE_DEPENDENCIES += zstd
+QT5BASE_CONFIGURE_OPTS += -zstd
+else
+QT5BASE_CONFIGURE_OPTS += -no-zstd
+endif
+
 # Qt5 SQL Plugins
 ifeq ($(BR2_PACKAGE_QT5BASE_SQL),y)
 ifeq ($(BR2_PACKAGE_QT5BASE_MYSQL),y)