3.16 backport: community/networkmanager: upgrade to 1.38.2
From the changelog:
- Fix race condition with pppd that caused failures when activating PPPoE connections.
- Unbreak DHCPv6 over PPP.
- Don't ignore IPv6 DNS servers received from PPP.
- Fix crash while checking WEP capability of Wi-Fi interfaces.
- Ensure DHCP is restarted every time the link goes up.
- Fix struct alignment issues seen on some architectures.
- Various other bugfixes and improvements.
(cherry picked from commit 1308f7a5)