rpb.inc: Enable igt-gpu-tools Chamelium support
rpb.inc: Enable igt-gpu-tools Chamelium support

The igt-gpu-tools recipe has been merged to OE-core [1],
however, the Chamelium support is disabled by default.

This will enable Chamelium support.

[1] http://layers.openembedded.org/layerindex/recipe/132395/

Signed-off-by: Arthur She <b76ba03ff82f85b92ceea934bf0f457286452ee9@linaro.org>

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