package/samba4: bump version to 4.21.4

Release notes: https://www.samba.org/samba/history/samba-4.21.4.html

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 716461af945e89af56eea4a3936c4a2adc7fdb4d)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

package/samba4/samba4.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature
-# https://download.samba.org/pub/samba/stable/samba-4.21.3.tar.asc
-sha256  ae2179a613e7a5d4088735ab100d4ca1cae0f92374d6307e22eaec13ad90125c  samba-4.21.3.tar.gz
+# https://download.samba.org/pub/samba/stable/samba-4.21.4.tar.asc
+sha256  50acf030db0ce6be1ee8a6c3a7636e54576c60a7f814e64becfa840f7b30eced  samba-4.21.4.tar.gz
 sha256  8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYING

package/samba4/samba4.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SAMBA4_VERSION = 4.21.3
+SAMBA4_VERSION = 4.21.4
 SAMBA4_SITE = https://download.samba.org/pub/samba/stable
 SAMBA4_SOURCE = samba-$(SAMBA4_VERSION).tar.gz
 SAMBA4_INSTALL_STAGING = YES