Add support for SWUpdate 2025.12

Add support to 2025.12 without removing previous releases, that are
still supported.

Signed-off-by: Stefano Babic <Stefano.Babic@swupdate.org>

recipes-support/swupdate/swupdate_2025.12.bb

@@ -0,0 +1,3 @@
+SRCBRANCH = "master"
+SRCREV = "3f7915fb64b4be9d7280e3167219a08348c128f2"
+require swupdate.inc

recipes-support/swupdate/swupdate_git.bb

@@ -2,5 +2,5 @@ require swupdate.inc
 
 DEFAULT_PREFERENCE = "-1"
 
-SRCREV ?= "33c5688590e811c9d54101accc6ea368ea5f0f50"
-PV = "2024.12+git${SRCPV}"
+SRCREV ?= "3f7915fb64b4be9d7280e3167219a08348c128f2"
+PV = "2025.12+git${SRCPV}"