Merge branch 'bugfix/btdm_fix_crash_adv_scan_coex_v3.2' into 'release/v3.2'

component/bt: fix crash when adv and scan coex and optimize duplicate scan (backport v3.2)

See merge request idf/esp-idf!3994
This commit is contained in:
Jiang Jiang Jian
2018-12-21 15:59:53 +08:00