include/package-pack: translate PKGARCH for APK

We have a lot of script-only packages that are universal for all arch-s
and those set PKGARCH:=all to indicate it.

Unfortunately, APK expects architecture to be set to "noarch" instead to
indicate that its universal so instead of having to update all packages
that set PKGARCH:=all and thus break OPKG lets simply translate "all" to
"noarch" when generating the APK package.

This will be required as soon we update APK to include [1] as it will start
enforcing package architecture checks.

[1] c1a3e69f24

Suggested-by: Jonas Gorski <jonas.gorski@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17015
Signed-off-by: Robert Marko <robimarko@gmail.com>

include/package-pack.mk

@@ -344,7 +344,7 @@ else
 	  --info "name:$(1)$$(ABIV_$(1))" \
 	  --info "version:$(VERSION)" \
 	  --info "description:$$(call description_escape,$$(strip $$(Package/$(1)/description)))" \
-	  --info "arch:$(PKGARCH)" \
+	  $(if $(findstring all,$(PKGARCH)),--info "arch:noarch",--info "arch:$(PKGARCH)") \
 	  --info "license:$(LICENSE)" \
 	  --info "origin:$(SOURCE)" \
 	  --info "url:$(URL)" \