ci-yadp-builder*: Raise days-to-keep to 90

While keeping num-to-keep the same. We don't update the related files
too often, and it's a bit scary to not have a previous successful job
reference around.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I6453522a041586f6700897a206e8d6d4962db811
2 files changed