Build haxedoc and haxelib from the Makefile.

This used to be in here, but was lost when the Makefile was regenerated. Feel
free to revert if that was intentional.

Makefile

@@ -30,7 +30,7 @@ MODULES=ast type lexer common genxml parser typecore optimizer typeload \
 	codegen genas3 gencommon gencpp genjs genneko genphp genswf8 \
 	gencs genjava genswf9 interp genswf typer main
 
-all: libs haxe
+all: libs haxe tools
 
 libs:
 	(cd libs/extlib; make opt)
@@ -42,6 +42,10 @@ libs:
 haxe: $(MODULES:=.cmx)
 	$(OCAMLOPT) -o $(OUTPUT) $(NATIVE_LIBS) $(LIBS) $(MODULES:=.cmx)
 
+tools:
+	(cd std/tools/haxedoc && haxe haxedoc.hxml && cp haxedoc ../../..)
+	(cd std/tools/haxelib && haxe haxelib.hxml && cp haxelib ../../..)
+
 export:
 	cp haxe*.exe doc/CHANGES.txt $(EXPORT)
 	rsync -a --exclude .svn --exclude *.n --exclude std/mt --exclude std/mtwin --delete std $(EXPORT)