Update to the last version of nonos-sdk V2, WiFi addons (#5210)

* fwupdate

* fw update to latest version:
WPA working, WEP+Open disabled by default. Need API change.

* helpers to follow sdk updates

* remove compare scripts - made a separate PR for them

* add wep api, restore original espressif comment (wep enabled does not prevent wpa)

* libmain was not up to date

* experimental: DTIM setting in WiFi.setSleepMode(WIFI_LIGHT/MODEM_SLEEP, DTIM-value)
with new getter: .getListenInterval() / .isSleepLevelMax()

* fixes

* fix debug message

* when not using listenInterval, set wifi sleep level to min

* update documentation

* update doc

tools/sdk/lib/fix_sdk_libs.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 set -e
 
+export PATH=../../xtensa-lx106-elf/bin:$PATH
+
 # Remove mem_manager.o from libmain.a to use custom heap implementation,
 # and time.o to fix redefinition of time-related functions:
 xtensa-lx106-elf-ar d libmain.a mem_manager.o
@@ -13,4 +15,4 @@ xtensa-lx106-elf-objcopy --redefine-sym hostname=wifi_station_hostname eagle_lwi
 xtensa-lx106-elf-objcopy --redefine-sym default_hostname=wifi_station_default_hostname user_interface.o 
 xtensa-lx106-elf-objcopy --redefine-sym default_hostname=wifi_station_default_hostname eagle_lwip_if.o 
 xtensa-lx106-elf-ar r libmain.a eagle_lwip_if.o user_interface.o 
-rm eagle_lwip_if.o user_interface.o
+rm -f eagle_lwip_if.o user_interface.o