Adding CentOS 5.8 nodes and QNX armv7 labels.

Change-Id: Ic3b73cdd6f4607fa163b7fcfe0d690e8d3b6c0d3
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>