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/sysmacros.h

@@ -0,0 +1,18 @@
+#ifndef _SYS_SYSMACROS_H
+#define _SYS_SYSMACROS_H 1
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define __need_pid_t
+#include <sys/types.h>
+
+#define makedev(maj, min) ((dev_t)(maj) << 32 | (dev_t)(min))
+
+#define major(dev) (((dev) >> 32) & 0xFFFFFFFF)
+#define minor(dev) ( (dev)        & 0xFFFFFFFF)
+
+__END_DECLS
+
+#endif