Updated Linux and ARM release tags

[digimaun]

Checklist

• I have read the [contribution guidelines] (https://github.com/Azure/azure-iot-sdk-python/blob/master/.github/CONTRIBUTING.md).

• I added or modified the existing tests to cover the change (we do not allow our test coverage to go down).
  I have rerun the release scripts. No tests failed.

• If this is a modification that impacts the behavior of a public API

  • I edited the corresponding document in the devdoc folder and added or modified requirements.

• I submitted this PR against the correct branch: I am not sure what the current dev branch is!

  • [] This pull-request is submitted against the master branch.

Reference/Link to the issue solved with this PR (if any)

Description of the problem

Existing platform architecture tags are not compliant with PEP513. Also there is no specifier for ARM like for Raspberry Pi.

Description of the solution

Small tweak to the Release.sh script with correct identifiers as specified by
https://www.python.org/dev/peps/pep-0513/ (for Linux)

and future state (for arm)
pypi/warehouse#2003

Presently Pypi accepts the manylinux1_....

[msftclas]

@digimaun,
Thanks for your contribution as a Microsoft full-time employee or intern. You do not need to sign a CLA.
Thanks,
Microsoft Pull Request Bot

[zolvarga]

Hi Paymaun,

Please remove the service/src/iothub_service_client_python.cpp changes from the PR.
Our release process will maintain the version number of the Python SDK. We should not change it directly.

Thanks,
Zoltan

[digimaun]

Might there be a better branch to submit a pull request against? Like a current dev branch? The .cpp version change was actually from a different author - not from the changes I would like to submit.

Thank You,
Paymaun