Merge branch 'bugfix/fix_signal_test_bug_v3.1' into 'release/v3.1'

esp32: fix a bug caused by signal test code (backport v3.1)

See merge request idf/esp-idf!4814
This commit is contained in:
Jiang Jiang Jian
2019-04-17 22:48:47 +08:00