connman: fix CVE-2021-33833

ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based
buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or
RDLENGTH (for A or AAAA).

Backport patch from:
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=eceb2e8d2341c041df55a5e2f047d9a8c491463c



CVE: CVE-2021-33833

Signed-off-by: Steve Sakoman <steve@sakoman.com>