Expose the NDK STLs to make.

Without this any module exposed to make that uses an NDK STL will
have unsatisfied dependencies.

Test: make native
Bug: None
Change-Id: Ia456cdc230d5ebf5e1256ab131ab78248b790bc8
diff --git a/cc/ndk_prebuilt.go b/cc/ndk_prebuilt.go
index 13424e3..69e07b9 100644
--- a/cc/ndk_prebuilt.go
+++ b/cc/ndk_prebuilt.go
@@ -141,7 +141,10 @@
 	module.compiler = nil
 	module.linker = linker
 	module.installer = nil
-	module.Properties.HideFromMake = true
+	minVersionString := "minimum"
+	noStlString := "none"
+	module.Properties.Sdk_version = &minVersionString
+	module.stl.Properties.Stl = &noStlString
 	return module.Init()
 }