ci-dockerfiles-deployment/builders.sh: Fetch trustedfirmware-fvp S3 bucket

The idea is to make files contained in it available to individual images'
build.sh scripts.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I2ea6c165f02675faf4bec2abcd794576b774f848
1 file changed