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/time.h

@@ -0,0 +1,97 @@
+#ifndef _TIME_H
+#define _TIME_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/time.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_clock_t
+#define __need_size_t
+#define __need_time_t
+#define __need_clockid_t
+#define __need_timer_t
+#define __need_pid_t
+#include <sys/types.h>
+
+#define __need_NULL
+#include <stddef.h>
+
+#include <bits/types/locale_t.h>
+
+#include <signal.h>
+
+struct tm
+{
+	int tm_sec;		/* Seconds [0,60]. */
+	int tm_min;		/* Minutes [0,59]. */
+	int tm_hour;	/* Hour [0,23]. */
+	int tm_mday;	/* Day of month [1,31]. */
+	int tm_mon;		/* Month of year [0,11]. */
+	int tm_year;	/* Years since 1900. */
+	int tm_wday;	/* Day of week [0,6] (Sunday =0). */
+	int tm_yday;	/* Day of year [0,365]. */
+	int tm_isdst;	/* Daylight Savings flag. */
+};
+
+struct timespec
+{
+	time_t	tv_sec;		/* Seconds. */
+	long	tv_nsec;	/* Nanoseconds. */
+};
+
+struct itimerspec
+{
+	struct timespec it_interval;	/* Timer period. */
+	struct timespec it_value;		/* Timer expiration. */
+};
+
+#define CLOCKS_PER_SEC ((clock_t)1000000)
+
+#define CLOCK_MONOTONIC				0
+#define CLOCK_PROCESS_CPUTIME_ID	1
+#define CLOCK_REALTIME				2
+#define CLOCK_THREAD_CPUTIME_ID		3
+
+#define TIMER_ABSTIME 1
+
+// FIXME
+// #define getdate_err(int)
+
+char*		asctime(const struct tm* timeptr);
+char*		asctime_r(const struct tm* __restrict tm, char* __restrict buf);
+clock_t		clock(void);
+int			clock_getcpuclockid(pid_t pid, clockid_t* clock_id);
+int			clock_getres(clockid_t clock_id, struct timespec* res);
+int			clock_gettime(clockid_t clock_id, struct timespec* tp);
+int			clock_nanosleep(clockid_t clock_id, int flags, const struct timespec* rqtp, struct timespec* rmtp);
+int			clock_settime(clockid_t clock_id, const struct timespec* tp);
+char*		ctime(const time_t* clock);
+char*		ctime_r(const time_t* clock, char* buf);
+double		difftime(time_t time1, time_t time0);
+struct tm*	getdate(const char* string);
+struct tm*	gmtime(const time_t* timer);
+struct tm*	gmtime_r(const time_t* __restrict timer, struct tm* __restrict result);
+struct tm*	localtime(const time_t* timer);
+struct tm*	localtime_r(const time_t* __restrict timer, struct tm* __restrict result);
+time_t		mktime(struct tm* timeptr);
+int			nanosleep(const struct timespec* rqtp, struct timespec* rmtp);
+size_t		strftime(char* __restrict s, size_t maxsize, const char* __restrict format, const struct tm* __restrict timeptr);
+size_t		strftime_l(char* __restrict s, size_t maxsize, const char* __restrict format, const struct tm* __restrict timeptr, locale_t locale);
+char*		strptime(const char* __restrict buf, const char* __restrict format, struct tm* __restrict tm);
+time_t		time(time_t* tloc);
+int			timer_create(clockid_t clockid, struct sigevent* __restrict evp, timer_t* __restrict timerid);
+int			timer_delete(timer_t timerid);
+int			timer_getoverrun(timer_t timerid);
+int			timer_gettime(timer_t timerid, struct itimerspec* value);
+int			timer_settime(timer_t timerid, int, const struct itimerspec* __restrict value, struct itimerspec* __restrict ovalue);
+void		tzset(void);
+
+extern int		daylight;
+extern long		timezone;
+extern char*	tzname[];
+
+__END_DECLS
+
+#endif