dbus: upgrade 1.12.18 -> 1.12.20

Source: https://git.openembedded.org/openembedded-core
MR: 108825
Type: Security Fix
Disposition: Backport from https://git.openembedded.org/openembedded-core/commit/meta/recipes-core/dbus?id=bfaef91e77cd54e4f642e966903aac3f3291c325


ChangeID: bfaef91e
Description:

Bugz only update
Includes fix for CVE-2020-35512

ab88811768 (HEAD, tag: dbus-1.12.20) v1.12.20
5757fd5480 Update NEWS
f3b2574f0c userdb: Reference-count DBusUserInfo, DBusGroupInfo <- cve fix
37b36d49a6 userdb: Make lookups return a const pointer
732284d530 Solaris and derivatives do not adjust cmsg_len on MSG_CTRUNC
1f8c42c7cd Start 1.12.20 development

(From OE-Core rev: bfaef91e)

Signed-off-by: Wang Mingyu <wangmy@cn.fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit bfaef91e)
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>