package/qt5/qt5base: add libkrb5 optional dependency

libkrb5 is an optional dependency which is enabled by default (with no
user option) since version 5.14.0 and
https://github.com/qt/qtbase/commit/93b7b0ec76572427291d8e2eef9a10eb499417a9

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

@@ -233,6 +233,8 @@ QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_TSLIB),tslib)
 QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_LIBGLIB2),-glib,-no-glib)
 QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_LIBGLIB2),libglib2)
 
+QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_LIBKRB5),libkrb5)
+
 QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_ICU),-icu,-no-icu)
 QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_ICU),icu)