ruby : handle build options on installation (#3206)

ruby : handle build options on installation (#3206)

* Don't pass empty string to cmake command

* Refactor Dependencies

* Use found cmake path for options

* Maintain extsources.rb

* List dependent files by directory separator agnostic way

* Prepend whitespace before '='

* Handle build options on install

* Remove useless test

* Retrieve gem file name and version from spec file

* Bump version to 1.3.3

* Update date

* Add install option examples

* [skip ci]Remove unused module