Update .gitignore
Update .gitignore

Add the output directories created by the Android build.

Signed-off-by: Jerome Forissier <ced78d268b4c9a0a20a59a9feeebd2ad90da03d3@linaro.org>
Reviewed-by: Jens Wiklander <7706914404370d7502c27a0eff493dcf491feb51@linaro.org>
Reviewed-by: Pascal Brand <0b55292d2562685bad4ce52d64f802e8f1cd299e@linaro.org>

pascal-brand-st-dev/optee_client,prime-zeng/optee_client,cedric-chaumont-st-dev/optee_client