Write variables to .bash_profile (#2545)
Write variables to .bash_profile (#2545)

* Write variables to .bash_profile

* Force write in .bash_profile 

Write in `.bash_profile` even if it does not exists (default cases for brand new macOS)

* Update final message for environment variables

NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli