add support for hidden packages that get selected/built but do not show up in menuconfig

SVN-Revision: 27344

include/package-defaults.mk

@@ -42,6 +42,7 @@ define Package/Default
   TITLE:=
   KCONFIG:=
   BUILDONLY:=
+  HIDDEN:=
   URL:=
   VARIANT:=
 endef

include/package-dumpinfo.mk

@@ -45,6 +45,7 @@ Source: $(PKG_SOURCE)
 Type: $(if $(Package/$(1)/targets),$(Package/$(1)/targets),$(if $(PKG_TARGETS),$(PKG_TARGETS),ipkg))
 $(if $(KCONFIG),Kernel-Config: $(KCONFIG)
 )$(if $(BUILDONLY),Build-Only: $(BUILDONLY)
+)$(if $(HIDDEN),Hidden: $(HIDDEN)
 )Description: $(if $(Package/$(1)/description),$(Package/$(1)/description),$(TITLE))
 $(if $(URL),$(URL)
 )$(MAINTAINER)