Merge branch 'bugfix/ipv6_send_data_error_when_src_ip_miss_for_4.2' into 'release/v4.2'

lw-ip:ipv6 send multicast data fail when src address is null (backport 4.2)

See merge request espressif/esp-idf!10558
This commit is contained in:
Jiang Jiang Jian
2020-09-24 12:30:35 +08:00