Return all targets when supplying empty layers list on iOS #2005

Job	Run time
Static code analysis	1m 26s
Check formatting	1m 22s
Build web	2m 4s
Build iOS package	4m 53s
Run web tests	1m 51s
Generate code from templates	1m 22s
Build Android apk	6m 23s
Run tests	1m 23s
	20m 44s

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