Don't build web.cordova when not running on mobile targets
Don't build web.cordova when not running on mobile targets

Closes #6417.

mjmasn/meteor,AnthonyAstige/meteor,nuvipannu/meteor,4commerce-technologies-AG/meteor,mjmasn/meteor,nuvipannu/meteor,lorensr/meteor,Hansoft/meteor,mjmasn/meteor,AnthonyAstige/meteor,jdivy/meteor,Hansoft/meteor,AnthonyAstige/meteor,4commerce-technologies-AG/meteor,lorensr/meteor,DAB0mB/meteor,lorensr/meteor,nuvipannu/meteor,DAB0mB/meteor,chasertech/meteor,chasertech/meteor,Hansoft/meteor,4commerce-technologies-AG/meteor,chasertech/meteor,jdivy/meteor,AnthonyAstige/meteor,mjmasn/meteor,jdivy/meteor,mjmasn/meteor,jdivy/meteor,chasertech/meteor,AnthonyAstige/meteor,jdivy/meteor,lorensr/meteor,Hansoft/meteor,nuvipannu/meteor,DAB0mB/meteor,jdivy/meteor,chasertech/meteor,4commerce-technologies-AG/meteor,4commerce-technologies-AG/meteor,DAB0mB/meteor,lorensr/meteor,lorensr/meteor,AnthonyAstige/meteor,mjmasn/meteor,Hansoft/meteor,AnthonyAstige/meteor,nuvipannu/meteor,4commerce-technologies-AG/meteor,nuvipannu/meteor,lorensr/meteor,Hansoft/meteor,Hansoft/meteor,nuvipannu/meteor,chasertech/meteor,DAB0mB/meteor,jdivy/meteor,4commerce-technologies-AG/meteor,AnthonyAstige/meteor,mjmasn/meteor,chasertech/meteor,DAB0mB/meteor,DAB0mB/meteor