Bp2build support for runtime_libs

Bug: 213201180
Test: Updated the minimal apex in the build/bazel cl to include runtime_libs so the apex diff test will test it
Change-Id: I10add1895cfa122a370d24196a33ec2dcfafccfc
diff --git a/cc/binary.go b/cc/binary.go
index b2f2482..849aafa 100644
--- a/cc/binary.go
+++ b/cc/binary.go
@@ -617,6 +617,7 @@
 		Dynamic_deps:       baseAttrs.implementationDynamicDeps,
 		Whole_archive_deps: baseAttrs.wholeArchiveDeps,
 		System_deps:        baseAttrs.systemDynamicDeps,
+		Runtime_deps:       baseAttrs.runtimeDeps,
 
 		Local_includes:    baseAttrs.localIncludes,
 		Absolute_includes: baseAttrs.absoluteIncludes,
@@ -667,6 +668,7 @@
 	Dynamic_deps       bazel.LabelListAttribute
 	Whole_archive_deps bazel.LabelListAttribute
 	System_deps        bazel.LabelListAttribute
+	Runtime_deps       bazel.LabelListAttribute
 
 	Local_includes    bazel.StringListAttribute
 	Absolute_includes bazel.StringListAttribute