Kernel: More PID/TID typing

Author: https://github.com/BenWiederhake
Commit: bee08a4b9f
Pull-request: https://github.com/SerenityOS/serenity/pull/3057
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/bgianfo

Kernel/API/Syscall.h

@@ -440,7 +440,7 @@ struct SC_stat_params {
 
 struct SC_ptrace_params {
     int request;
-    pid_t pid;
+    pid_t tid;
     Userspace<u8*> addr;
     int data;
 };