package/samba4: security bump version to 4.15.13

Release notes:
https://www.samba.org/samba/history/samba-4.15.13.html

Fixes CVE-2022-37966, CVE-2022-37967, CVE-2022-38023 & CVE-2022-45141.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 734cc8e951e899a88867feb83b0bf087a7d6b542)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/samba4/samba4.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature
-# https://download.samba.org/pub/samba/stable/samba-4.15.12.tar.asc
-sha256  5889493d69dc7723be6c3154387fbed38c1cddf93a16da8670d99b7cca33b15e  samba-4.15.12.tar.gz
+# https://download.samba.org/pub/samba/stable/samba-4.15.13.tar.asc
+sha256  c412e3536a5265d04e52983e643bae9e047bcc3eac08683a945b1057ecdf4968  samba-4.15.13.tar.gz
 sha256  8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYING

package/samba4/samba4.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SAMBA4_VERSION = 4.15.12
+SAMBA4_VERSION = 4.15.13
 SAMBA4_SITE = https://download.samba.org/pub/samba/stable
 SAMBA4_SOURCE = samba-$(SAMBA4_VERSION).tar.gz
 SAMBA4_INSTALL_STAGING = YES