Pass extra args from multiproduct_kati to config.

Allows specifying make goals when using multiproduct_kati, for example:
$ multiproduct_kati -only-config dump-products

This makes dumping products with multiproduct_kati easier than before.

Test: multiproduct_kati -only-config -products=full,aosp_arm64 -out=/tmp/p dump-products
Change-Id: If526bd2ba1b7bbadcb230c020202ef9e421e1852
diff --git a/cmd/multiproduct_kati/main.go b/cmd/multiproduct_kati/main.go
index a6bc8d5..813c060 100644
--- a/cmd/multiproduct_kati/main.go
+++ b/cmd/multiproduct_kati/main.go
@@ -307,7 +307,7 @@
 			}}
 			productCtx.Status.AddOutput(terminal.NewStatusOutput(productCtx.Writer, ""))
 
-			productConfig := build.NewConfig(productCtx)
+			productConfig := build.NewConfig(productCtx, flag.Args()...)
 			productConfig.Environment().Set("OUT_DIR", productOutDir)
 			build.FindSources(productCtx, productConfig, finder)
 			productConfig.Lunch(productCtx, product, *buildVariant)