include/package-pack: set missing Description on .apk creation

Set missing description info on .apk creation. This was probably a TODO
that wasn't notice when the final implementation was pushed.

Fixes: d788ab376f85 ("build: add APK package build capabilities")
Signed-off-by: Christian Marangi <[email protected]>

include/package-pack.mk

@@ -339,7 +339,7 @@ else
 	$(FAKEROOT) $(STAGING_DIR_HOST)/bin/apk mkpkg \
 	  --info "name:$(1)$$(ABIV_$(1))" \
 	  --info "version:$(VERSION)" \
-	  --info "description:" \
+	  --info "description: $$(strip $$(Package/$(1)/description))" \
 	  --info "arch:$(PKGARCH)" \
 	  --info "license:$(LICENSE)" \
 	  --info "origin:$(SOURCE)" \