The case sets one pin as output and the other as INPUT_OUTPUT (so output buffer
is enabled in both), then only changes level of one pin - causing a conflict.
Probably this test should be deleted, as it's not good practice for two output
pins to drive each other, but this fix also seems to work.
1. separate rom include files and linkscript to esp_rom
2. modefiy "include rom/xxx.h" to "include esp32/rom/xxx.h"
3. Forward compatible
4. update mqtt