esp32s2: Use better optimizer flags in debug builds

(note that the before and after files both lack trailing newlines; this is
how the esp-idf do)

OPTIMIZATION_DEFAULT is -Og, which enables optimizations that do not
interfere with the debugger:
```
    elseif(CONFIG_COMPILER_OPTIMIZATION_DEFAULT)
        list(APPEND compile_options "-Og")
```

Author: jepler

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

@@ -10,4 +10,7 @@ CONFIG_ESP_CONSOLE_UART_BAUDRATE=115200
 CONFIG_ESP_SYSTEM_PANIC_PRINT_HALT=y
 # CONFIG_ESP_SYSTEM_PANIC_PRINT_REBOOT is not set
 # CONFIG_ESP_SYSTEM_PANIC_SILENT_REBOOT is not set
-# CONFIG_ESP_SYSTEM_PANIC_GDBSTUB is not set
+# CONFIG_ESP_SYSTEM_PANIC_GDBSTUB is not set
+CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_DEBUG=y
+CONFIG_COMPILER_OPTIMIZATION_DEFAULT=y
+CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_ENABLE=y