LibC: Add stubs that I have locally

I'm not sure if these are used by anything but I would assume so as I
have added them :D

functions added:
- getprotobyname
- open_memstream
- munlock
- lockf
- nice
- crypt
- getsid
- wcstoul

userspace/libraries/LibC/unistd.cpp

@@ -689,6 +689,30 @@ int getpagesize(void)
 	return PAGE_SIZE;
 }
 
+int lockf(int fildes, int function, off_t size)
+{
+	(void)fildes;
+	(void)function;
+	(void)size;
+	derrorln("TODO: lockf");
+	ASSERT_NOT_REACHED();
+}
+
+int nice(int incr)
+{
+	dwarnln("TODO: nice({})", incr);
+	errno = EPERM;
+	return -1;
+}
+
+char* crypt(const char* key, const char* salt)
+{
+	(void)key;
+	(void)salt;
+	derrorln("TODO: crypt");
+	ASSERT_NOT_REACHED();
+}
+
 char* getpass(const char* prompt)
 {
 	static char buffer[PASS_MAX];
@@ -774,6 +798,12 @@ pid_t getpgid(pid_t pid)
 	return syscall(SYS_GET_PGID, pid);
 }
 
+pid_t getsid(pid_t pid)
+{
+	(void)pid;
+	ASSERT_NOT_REACHED();
+}
+
 int tcgetpgrp(int fildes)
 {
 	return syscall(SYS_TCGETPGRP, fildes);