Fix native platform add after cloud build. (#3075)
Fix native platform add after cloud build. (#3075)

When we prepare the platform for cloud build we skip the native prepare.
After this partial prepare, the platform directory contains only .js files.
In order to make a local build we should add the native part of the platform
which fails with `ENOTEMPTY: directory not empty, rename`.
NativeScript/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli