Fail SBG when there's no sbg-bindings.txt file generated

[vtrifonov]

Is your feature request related to a problem? Please describe.
When there's a problem in the JS Parser and no output file(sbg-bindings.txt) is generated the build will just output a stack trace from the SBG for missing sbg-bindings.txt file, but will continue and an error will be thrown in runtime.

Describe the solution you'd like
In that case it would be better to stop the build, so that it would be more obvious where the problem is.

Additional context
In addition to that it would be good if we can easily get the errors from the JS Parser run either by starting only the JS Parser like this:

node platforms/android/build-tools/jsparser/js_parser.js enableErrorLogging

or by setting environment variable with tns build android like this

export JS_PARSER_ERROR_LOGGING=true && tns build android