packagegroup-tools-benchmark: Remove netperf.

* netperf has licnesing issues so when we add tools-benchmark as
  IMAGE_FEATURE we get parsing error that netperf can't be build
  due to licenseing issue. Remogin it from Recipe for the time being.

Signed-off-by: Noor Ahsan <noor_ahsan@mentor.com>
Merge remote-tracking branch 'mel/release/2014.05' into foo
Merge pull request #287 from drewmoseley/merge-from-release-2014.05

Merge from release 2014.05