Merge branch 'bugfix/coex_update_phy_to_fix_interrupt_wdt_v3.1' into 'release/v3.1'

esp32: update libphy.a to fix interrupt watchdog when WiFi and BT run at the same time and both enable modem sleep (backport v3.1)

See merge request idf/esp-idf!4193
This commit is contained in:
Jiang Jiang Jian
2019-01-30 12:02:12 +08:00