recipes-test/images: Add diag tool to initramfs-bootrr-image
recipes-test/images: Add diag tool to initramfs-bootrr-image

For enable usage of diag on ramdisk testing (bootrr, functional).

Signed-off-by: Aníbal Limón <4676e39632f2bd46f30a0e877949547c228033d4@linaro.org>
(cherry picked from commit 19b14065fe16ba53a29e3ea2c62e11135725ffb3)

ndechesne/meta-qcom,ndechesne/meta-qualcomm,ndechesne/meta-qcom,ndechesne/meta-qcom