package/z3: bump to version 4.12.5

For change log since 4.12.4, see:
https://github.com/Z3Prover/z3/blob/z3-4.12.5/RELEASE_NOTES.md#version-4125

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/z3/z3.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  25e9b18d04ee22f1d872dfe0daaf4c39034744525214e34fedd206e25140e96e  z3-4.12.4.tar.gz
+sha256  70e211e0a8e77febccc51865e45111066f623356a4ef0b527c3597362bc6db72  z3-4.12.5.tar.gz
 sha256  e617cad2ab9347e3129c2b171e87909332174e17961c5c3412d0799469111337  LICENSE.txt

package/z3/z3.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-Z3_VERSION = 4.12.4
+Z3_VERSION = 4.12.5
 Z3_SITE = $(call github,Z3Prover,z3,z3-$(Z3_VERSION))
 Z3_LICENSE = MIT
 Z3_LICENSE_FILES = LICENSE.txt