Rename jenkins to gerrit

This is just a bit more logical. The 'email' subdirectory is for the
email-based workflow, and 'gerrit' subdirectory is for the gerrit-based
workflow.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

diff --git a/jenkins/aiaiai-jenkins-test-patchset b/gerrit/aiaiai-jenkins-test-patchset
similarity index 100%
rename from jenkins/aiaiai-jenkins-test-patchset
rename to gerrit/aiaiai-jenkins-test-patchset