Issue 733 impl random init

[vehre]

coverage on master

Summary of changes

Add support for random_init().

Rationale for changes

Random_init() was changed in the gcc and support for it was needed.

Additional info and certifications

This pull request (PR) is a:

• [ ] Bug fix
• [x] Feature addition
• [ ] Other, Please describe:

I certify that

• [x] I certify that:
  • I have reviewed and followed the contributing guidelines
  • I will wait at least 24 hours before self-approving the PR to give another OpenCoarrays developer a chance to review my proposed code
  • I have not introduced errant white space (no trailing white space or white space errors may be introduced)
  • I have added an explanation of what these changes do and why they should be included
  • I have checked to ensure there aren't other open Pull Requests for the same change
  • I have you written new tests for these changes
  • I have successfully tested these changes locally
  • I have commented any non-trivial, non-obvious code changes
  • The commits are logically atomic, self consistent and coherent
  • The commit messages follow best practices
  • Test coverage is maintained or increased after this is merged

Code coverage data

[rouson]

@vehre could you please (re)sign the Contributor License Agreement. You must have signed it previously. I did too, but for some reason, I just had to resign it also.

[vehre]

@vehre could you please (re)sign the Contributor License Agreement. You must have signed it previously. I did too, but for some reason, I just had to resign it also.

Done.