Kristiyan Kostadinov ebac5dba38 fix(ivy): don't generate code for blank NgModule fields (#28387)
Currently `compileNgModule` generates an empty array for optional fields that are omitted from an `NgModule` declaration (e.g. `bootstrap`, `exports`). This isn't necessary, because `defineNgModule` has some code to default these fields to empty arrays at runtime if they aren't defined. The following changes will only output code if there are values for the particular field.

PR Close #28387
2019-01-28 19:50:44 -08:00
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