Jenkinsfile: update to latest release scheme

Merge pull request #57 from xmos/working_example

Working LED example

Merge pull request #41 from xmos/release/v2.1.0

Merge release/v2.1.0 into master

Merge pull request #31 from xmos/release/v2.0.1

Merge release/v2.0.1 into master

Merge pull request #24 from oscarbailey-xmos/patch-1

Remove upstream triggers

Merge pull request #22 from xmos/develop

Develop

Merge pull request #7 from arp2600/updating_build_scripts

Update xwaf build scripts

Now using xwaf config util functions

Merge pull request #1 from pthedinger/master

Updating ready for release 1.1.0

Merge pull request #1 from pthedinger/master

Updating ready for release 1.1.0

Merge pull request #1 from pthedinger/master

Updating ready for release 1.1.0