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/syslog.h

@@ -0,0 +1,52 @@
+#ifndef _SYSLOG_H
+#define _SYSLOG_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/syslog.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define LOG_PID		0x01
+#define LOG_CONS	0x02
+#define LOG_NDELAY	0x04
+#define LOG_ODELAY	0x08
+#define LOG_NOWAIT	0x10
+
+#define	LOG_EMERG	0
+#define	LOG_ALERT	1
+#define	LOG_CRIT	2
+#define	LOG_ERR		3
+#define	LOG_WARNING	4
+#define	LOG_NOTICE	5
+#define	LOG_INFO	6
+#define	LOG_DEBUG	7
+
+#define LOG_KERN	( 0 << 3)
+#define LOG_USER	( 1 << 3)
+#define LOG_MAIL	( 2 << 3)
+#define LOG_NEWS	( 3 << 3)
+#define LOG_UUCP	( 4 << 3)
+#define LOG_DAEMON	( 5 << 3)
+#define LOG_AUTH	( 6 << 3)
+#define LOG_CRON	( 7 << 3)
+#define LOG_LPR		( 8 << 3)
+#define LOG_LOCAL0	( 9 << 3)
+#define LOG_LOCAL1	(10 << 3)
+#define LOG_LOCAL2	(11 << 3)
+#define LOG_LOCAL3	(12 << 3)
+#define LOG_LOCAL4	(13 << 3)
+#define LOG_LOCAL5	(14 << 3)
+#define LOG_LOCAL6	(15 << 3)
+#define LOG_LOCAL7	(16 << 3)
+
+#define LOG_MASK(pri) (1 << (pri))
+
+void	closelog(void);
+void	openlog(const char* ident, int logopt, int facility);
+int		setlogmask(int maskpri);
+void	syslog(int priority, const char* message, ...);
+
+__END_DECLS
+
+#endif