Add go_option to allow for Go Protobuf generation

admin.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 
 option java_package = "com.geeksville.mesh";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 import "mesh.proto";
 import "radioconfig.proto";

apponly.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 
 option java_package = "com.geeksville.mesh";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 import "channel.proto";
 

channel.proto

@@ -20,7 +20,9 @@ syntax = "proto3";
  */
 
 option java_package = "com.geeksville.mesh";
+
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 option java_outer_classname = "ChannelProtos";
 

deviceonly.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 
 option java_package = "com.geeksville.mesh";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 import "mesh.proto";
 import "channel.proto";

environmental_measurement.proto

@@ -1,4 +1,5 @@
 syntax = "proto3";
+option go_package = "github.com/meshtastic/gomeshproto";
 
 message EnvironmentalMeasurement {
 

mesh.proto

@@ -21,6 +21,7 @@ syntax = "proto3";
 
 option java_package = "com.geeksville.mesh";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 import "portnums.proto";
 

mqtt.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 
 option java_package = "com.geeksville.mesh";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 import "mesh.proto";
 

portnums.proto

@@ -3,6 +3,7 @@ syntax = "proto3";
 option java_package = "com.geeksville.mesh";
 option java_outer_classname = "Portnums";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 /*
  * For any new 'apps' that run on the device or via sister apps on phones/PCs they should pick and use a

radioconfig.proto

@@ -22,6 +22,7 @@ syntax = "proto3";
 option java_package = "com.geeksville.mesh";
 option java_outer_classname = "RadioConfigProtos";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 /*
  * The frequency/regulatory region the user has selected.

remote_hardware.proto

@@ -3,6 +3,7 @@ syntax = "proto3";
 option java_package = "com.geeksville.mesh";
 option java_outer_classname = "RemoteHardware";
 option optimize_for = LITE_RUNTIME;
+option go_package = "github.com/meshtastic/gomeshproto";
 
 /*
  * An example app to show off the plugin system. This message is used for