optee-client.bb: add optee client recipe and patches

This has moved from meta-linaro to meta-arm as this
is the new place for general recipes for Arm arch
and has a mailing list for external contributors.

Change-Id: I5550620801d1d86217abb84f52fcd1e9a5873b08
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>