BuildSystem: Move all userpace libraries under the userspace directory

As the number of libraries is increasing, root directory starts to
expand. This adds better organization for libraries

userspace/libraries/LibC/include/sys/times.h

@@ -0,0 +1,25 @@
+#ifndef _SYS_TIMES_H
+#define _SYS_TIMES_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_times.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_clock_t
+#include <sys/types.h>
+
+struct tms
+{
+	clock_t tms_utime;	/* User CPU time. */
+	clock_t tms_stime;	/* System CPU time. */
+	clock_t tms_cutime;	/* User CPU time of terminated child processes. */
+	clock_t tms_cstime;	/* System CPU time of terminated child processes. */
+};
+
+clock_t times(struct tms* buffer);
+
+__END_DECLS
+
+#endif