added tar.h posix header.

* based on http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/tar.h.html

headers/posix/tar.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2014 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _TAR_H_
+#define _TAR_H_
+
+
+#define TMAGIC		"ustar"
+#define TMAGLEN		6
+#define TVERSION	"00"
+#define TVERSLEN	2
+
+#define REGTYPE		'0'
+#define AREGTYPE	'\0'
+#define LNKTYPE		'1'
+#define SYMTYPE		'2'
+#define CHRTYPE		'3'
+#define BLKTYPE		'4'
+#define DIRTYPE		'5'
+#define FIFOTYPE	'6'
+#define CONTTYPE	'7'
+
+#define TSUID		04000
+#define TGUID		02000
+//#define TSVTX		01000
+#define TUREAD		00400
+#define TUWRITE		00200
+#define TUEXEC		00100
+#define TGREAD		00040
+#define TGWRITE		00020
+#define TGEXEC		00010
+#define TOREAD		00004
+#define TOWRITE		00002
+#define TOEXEC		00001
+
+
+#endif	/* _TAR_H_ */
+