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/sys/resource.cpp

@@ -0,0 +1,7 @@
+#include <BAN/Assert.h>
+#include <sys/resource.h>
+
+int getrusage(int, struct rusage*)
+{
+	ASSERT_NOT_REACHED();
+}