Kernel: Use Userspace<T> for the setgroups syscall

Kernel/Process.h

@@ -264,7 +264,7 @@ public:
     int sys$sigprocmask(int how, const sigset_t* set, sigset_t* old_set);
     int sys$sigpending(sigset_t*);
     int sys$getgroups(ssize_t, gid_t*);
-    int sys$setgroups(ssize_t, const gid_t*);
+    int sys$setgroups(ssize_t, Userspace<const gid_t*>);
     int sys$pipe(int pipefd[2], int flags);
     int sys$killpg(pid_t pgrp, int sig);
     int sys$seteuid(uid_t);

Kernel/Syscalls/setuid.cpp

@@ -118,7 +118,7 @@ int Process::sys$setresgid(gid_t rgid, gid_t egid, gid_t sgid)
     return 0;
 }
 
-int Process::sys$setgroups(ssize_t count, const gid_t* user_gids)
+int Process::sys$setgroups(ssize_t count, Userspace<const gid_t*> user_gids)
 {
     REQUIRE_PROMISE(id);
     if (count < 0)