Basic xdot code to check how many memory is available for user APP after initializing libxdot lorawan stack

Revision:
43:97fd5b4de956
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libxDot.lib	Wed Jul 07 11:34:06 2021 +0000
@@ -0,0 +1,1 @@
+https://github.com/MultiTechSystems/libxDot/#d07c6a8801aba435dd6acc238ec4294419b94728