bp2build: arch-configurable selects for label list attrs.

This CL adds the configurable LabelListAttribute support to bp2build.

Test: go test
Change-Id: I2ef9e385d9cf1b1845988128eca1d8cda1ecb5e8

sh/sh_binary.go

@@ -485,7 +485,7 @@ func ShTestHostFactory() android.Module {
 }
 
 type bazelShBinaryAttributes struct {
-	Srcs bazel.LabelList
+	Srcs bazel.LabelListAttribute
 	// Bazel also supports the attributes below, but (so far) these are not required for Bionic
 	// deps
 	// data
@@ -525,7 +525,8 @@ func ShBinaryBp2Build(ctx android.TopDownMutatorContext) {
 		return
 	}
 
-	srcs := android.BazelLabelForModuleSrc(ctx, []string{*m.properties.Src})
+	srcs := bazel.MakeLabelListAttribute(
+		android.BazelLabelForModuleSrc(ctx, []string{*m.properties.Src}))
 
 	attrs := &bazelShBinaryAttributes{
 		Srcs: srcs,