package-dumpinfo: add CPE information to package index

Common Platform Enumeration (CPE) is a structured naming scheme for
information technology systems, software, and packages.

In order for the information to be processed further, it should also be
available in package index files.

Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit 33b3fea702)

include/package-dumpinfo.mk

@@ -36,6 +36,7 @@ $(if $(USERID),Require-User: $(USERID)
 )Source: $(PKG_SOURCE)
 $(if $(LICENSE),License: $(LICENSE)
 )$(if $(LICENSE_FILES),LicenseFiles: $(LICENSE_FILES)
+)$(if $(PKG_CPE_ID),CPE-ID: $(PKG_CPE_ID)
 )Type: $(if $(Package/$(1)/targets),$(Package/$(1)/targets),$(if $(PKG_TARGETS),$(PKG_TARGETS),ipkg))
 $(if $(KCONFIG),Kernel-Config: $(KCONFIG)
 )$(if $(BUILDONLY),Build-Only: $(BUILDONLY)