LibC: Add a lot of stub implementations for different libc functions

some ports want to link against these, but they are not ever called
based on simple testing

This patch adds stubs for
- openlog
- syslog
- getrusage
- mlock
- mprotect
- getpeername
- shutdown
- tzset
- mktime

userspace/libraries/LibC/time.cpp

@@ -452,3 +452,18 @@ size_t strftime(char* __restrict s, size_t maxsize, const char* __restrict forma
 	s[len++] = '\0';
 	return len;
 }
+
+
+
+#include <BAN/Assert.h>
+
+long timezone;
+void tzset()
+{
+	ASSERT_NOT_REACHED();
+}
+
+time_t mktime(struct tm*)
+{
+	ASSERT_NOT_REACHED();
+}