* Makefile: Don't build make-map.exe.

	* Makefile: Don't build make-map.exe.
	* Mono.Posix.dll.sources: Move MapAttribute into Mono.Unix.Native; remove
	  HeaderAttribute.cs; Add TypeAttributes.cs.
	* Mono.Unix/MapAttribute.cs: Moved to ../Mono.Unix.Native/MapAttribute.cs.
	* Mono.Unix.Native/HeaderAttribute.cs: Removed.  Use create-native-map
	  command-line arguments instead of HeaderAttribute.Includes &
	  HeaderAttribute.Defines.
	* Mono.Unix.Native/make-map.cs: Moved to
	  mono-tools/create-native-map/src/create-native-map.cs.
	* Mono.Unix.Native/MapAttribute.cs: Moved from ../Mono.Unix.  Can now be
	  specified on Class, Delegeate, Enum, Field, & Struct (instead of just
	  Enum).  Add NativeType property.
	* Mono.Unix.Native/NativeConvert.generated.cs: Flush (adds new .TryCopy
	  methods to copy [Map]'d structures).
	* Mono.Unix.Native/NativeConvert.cs: Add .TryCopy methods for Statvfs.
	* Mono.Unix.Native/Syscall.cs: Remove HeaderAttribute declaration; Markup
	  [Map]'d structure members with [Map] attributes (or MapAttribute
	  subclasses) to specify the native types they correspond to (used by
	  create-native-map).
	* Mono.Unix.Native/TypeAttributes.cs: Added; internal subclasses of
	  MapAttribute to help markup structures (e.g. so I can use [blkcnt_t]
	  instead of [Map ("blkcnt_t")], thus minimizing the liklihood of a
	  spelling error).

svn path=/trunk/mcs/; revision=66947