Export cc library factories.

Previously not useful, they are required to use CreateModule
to create additional libraries.

Bug: 35570956
Test: manual :)

Change-Id: Ibb6b1c0d365512fce8969e1e6237ebbed0bc9cdc
diff --git a/cc/cc_test.go b/cc/cc_test.go
index 35274f0..b7c2395 100644
--- a/cc/cc_test.go
+++ b/cc/cc_test.go
@@ -43,7 +43,7 @@
 	config.ProductVariables.DeviceVndkVersion = proptools.StringPtr("current")
 
 	ctx := android.NewTestArchContext()
-	ctx.RegisterModuleType("cc_library", android.ModuleFactoryAdaptor(libraryFactory))
+	ctx.RegisterModuleType("cc_library", android.ModuleFactoryAdaptor(LibraryFactory))
 	ctx.RegisterModuleType("toolchain_library", android.ModuleFactoryAdaptor(toolchainLibraryFactory))
 	ctx.RegisterModuleType("llndk_library", android.ModuleFactoryAdaptor(llndkLibraryFactory))
 	ctx.RegisterModuleType("cc_object", android.ModuleFactoryAdaptor(objectFactory))