esp32s2: Increase C stack size

The QR decoder has a single item that is 8908 bytes big and placed
on the stack.  (struct datastream)

Without enlarging the stack, this will reliably crash.

Author: jepler

ports/esp32s2/esp-idf-config/sdkconfig.defaults

@@ -275,7 +275,7 @@ CONFIG_ESP32S2_ALLOW_RTC_FAST_MEM_AS_HEAP=y
 CONFIG_ESP_ERR_TO_NAME_LOOKUP=y
 CONFIG_ESP_SYSTEM_EVENT_QUEUE_SIZE=32
 CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=2304
-CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=16384
 CONFIG_ESP_IPC_TASK_STACK_SIZE=1024
 CONFIG_ESP_MINIMAL_SHARED_STACK_SIZE=2048
 CONFIG_ESP_CONSOLE_UART_DEFAULT=y
@@ -806,7 +806,7 @@ CONFIG_ESP32_APPTRACE_LOCK_ENABLE=y
 CONFIG_ADC2_DISABLE_DAC=y
 CONFIG_SYSTEM_EVENT_QUEUE_SIZE=32
 CONFIG_SYSTEM_EVENT_TASK_STACK_SIZE=2304
-CONFIG_MAIN_TASK_STACK_SIZE=8192
+CONFIG_MAIN_TASK_STACK_SIZE=16384
 CONFIG_IPC_TASK_STACK_SIZE=1024
 CONFIG_CONSOLE_UART_DEFAULT=y
 # CONFIG_CONSOLE_UART_CUSTOM is not set