let portage compress CHANGES

--- doc/Makefile
+++ doc/Makefile
@@ -10,18 +10,15 @@
 LSRCFILES = INSTALL PORTING CHANGES COPYING
 LDIRT = *.gz
 
-default: $(SUBDIRS) CHANGES.gz
+default: $(SUBDIRS)
 	$(SUBDIRS_MAKERULE)
 
 include $(BUILDRULES)
 
-CHANGES.gz:
-	$(ZIP) --best -c < CHANGES > $@
-
 install: default
 	$(SUBDIRS_MAKERULE)
 	$(INSTALL) -m 755 -d $(PKG_DOC_DIR)
-	$(INSTALL) -m 644 PORTING CHANGES.gz $(PKG_DOC_DIR)
+	$(INSTALL) -m 644 PORTING CHANGES $(PKG_DOC_DIR)
 ifeq ($(PKG_DISTRIBUTION), debian)
 	$(INSTALL) -S CHANGES.gz $(PKG_DOC_DIR)/changelog.gz
 else