Transfer PID of profiled program.

common/TracyProtocol.hpp

@@ -9,7 +9,7 @@
 namespace tracy
 {
 
-enum : uint32_t { ProtocolVersion = 16 };
+enum : uint32_t { ProtocolVersion = 17 };
 enum : uint32_t { BroadcastVersion = 0 };
 
 using lz4sz_t = uint32_t;
@@ -66,6 +66,7 @@ struct WelcomeMessage
     uint64_t delay;
     uint64_t resolution;
     uint64_t epoch;
+    uint64_t pid;
     uint8_t onDemand;
     uint8_t isApple;
     char programName[WelcomeMessageProgramNameSize];