build: allow defining license information per binary package

At the moment, license information can only be specified on a
"per source package" level while other metadata fields (e.g. maintainer)
can be given for each binary package. Apply the same logic for license
fields as well. This can be used e.g. in cases where a library is
distributed under some license while related tools are distributed
under a different one.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

include/package-defaults.mk

@@ -57,6 +57,8 @@ define Package/Default
   DEFAULT_VARIANT:=
   USERID:=
   ALTERNATIVES:=
+  LICENSE:=$(PKG_LICENSE)
+  LICENSE_FILES:=$(PKG_LICENSE_FILES)
 endef
 
 Build/Patch:=$(Build/Patch/Default)

include/package-dumpinfo.mk

@@ -46,8 +46,8 @@ $(if $(filter nonshared,$(PKGFLAGS)),,Repository: $(if $(FEED),$(FEED),base)
 Maintainer: $(MAINTAINER)
 $(if $(USERID),Require-User: $(USERID)
 )Source: $(PKG_SOURCE)
-$(if $(PKG_LICENSE),License: $(PKG_LICENSE)
-)$(if $(PKG_LICENSE_FILES),LicenseFiles: $(PKG_LICENSE_FILES)
+$(if $(LICENSE),License: $(LICENSE)
+)$(if $(LICENSE_FILES),LicenseFiles: $(LICENSE_FILES)
 )Type: $(if $(Package/$(1)/targets),$(Package/$(1)/targets),$(if $(PKG_TARGETS),$(PKG_TARGETS),ipkg))
 $(if $(KCONFIG),Kernel-Config: $(KCONFIG)
 )$(if $(BUILDONLY),Build-Only: $(BUILDONLY)

include/package-ipkg.mk

@@ -161,8 +161,8 @@ $$(call addfield,Depends,$$(Package/$(1)/DEPENDS)
 )$$(call addfield,Provides,$$(call mergelist,$(PROVIDES))
 )$$(call addfield,Alternatives,$$(call mergelist,$(ALTERNATIVES))
 )$$(call addfield,Source,$(SOURCE)
-)$$(call addfield,License,$$(PKG_LICENSE)
-)$$(call addfield,LicenseFiles,$$(PKG_LICENSE_FILES)
+)$$(call addfield,License,$(LICENSE)
+)$$(call addfield,LicenseFiles,$(LICENSE_FILES)
 )$$(call addfield,Section,$(SECTION)
 )$$(call addfield,Require-User,$(USERID)
 )$(if $(filter hold,$(PKG_FLAGS)),Status: unknown hold not-installed