Bug 521210: update to latest release version of eclipse orbit

* the docs build is currently broken due to a target reference to an
orbit S build that no longer exists
* this commit updates the target platforms to the latest eclipse orbit
release which is a permanent repository location

Change-Id: I327af51a38165cf85d20f6fc13b6c16fab3962f2
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=521210
Signed-off-by: David Slater <david.slater@tasktop.com>
9 files changed