Moving platform-native into meshtastic fork (#1437)

variants/portduino/platformio.ini

@@ -1,6 +1,6 @@
 ; The Portduino based sim environment on top of any host OS, all hardware will be simulated
 [env:native]
-platform = https://github.com/geeksville/platform-native.git 
+platform = https://github.com/meshtastic/platform-native.git 
 src_filter = 
   ${env.src_filter} 
   -<esp32/> 
@@ -19,7 +19,7 @@ lib_deps =
 
 ; The Portduino based sim environment on top of a linux OS and touching linux hardware devices
 [env:linux]
-platform = https://github.com/geeksville/platform-native.git 
+platform = https://github.com/meshtastic/platform-native.git 
 src_filter = 
   ${env.src_filter} 
   -<esp32/>