Fix dependency merging for rust-project.json

// appendLibraryAndDeps creates a rustProjectCrate for the module argument and

// appends it to the rustProjectJson struct.  It visits the dependencies of the

// module depth-first. If the current module is already in knownCrates, its

// its dependencies are merged. Returns a tuple (id, crate_name, ok).

// dependencies are merged. Returns a tuple (id, crate_name, ok).

func appendLibraryAndDeps(ctx android.SingletonContext, project *rustProjectJson,

	knownCrates map[string]crateInfo, module android.Module) (int, string, bool) {

	rModule, ok := module.(*Module)

		// We have seen this crate already; merge any new dependencies.

		crate := project.Crates[cInfo.ID]

		mergeDependencies(ctx, project, knownCrates, module, &crate, cInfo.Deps)

		project.Crates[cInfo.ID] = crate

		return cInfo.ID, crateName, true

	}

	crate := rustProjectCrate{Deps: make([]rustProjectDep, 0), Cfgs: make([]string, 0)}