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/cpio.h

@@ -0,0 +1,35 @@
+#ifndef _CPIO_H
+#define _CPIO_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/cpio.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define C_IRUSR		0000400
+#define C_IWUSR		0000200
+#define C_IXUSR		0000100
+#define C_IRGRP		0000040
+#define C_IWGRP		0000020
+#define C_IXGRP		0000010
+#define C_IROTH		0000004
+#define C_IWOTH		0000002
+#define C_IXOTH		0000001
+#define C_ISUID		0004000
+#define C_ISGID		0002000
+#define C_ISVTX		0001000
+#define C_ISDIR		0040000
+#define C_ISFIFO	0010000
+#define C_ISREG		0100000
+#define C_ISBLK		0060000
+#define C_ISCHR		0020000
+#define C_ISCTG		0110000
+#define C_ISLNK		0120000
+#define C_ISSOCK	0140000
+
+#define MAGIC "070707"
+
+__END_DECLS
+
+#endif