ci(spm): update static binaries to 07-29-2021

Update static binaries required for SPM testing to:
/arm/pdsw/downloads/tf-a/spm/07-29-2021

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I6a7095ab7deb0b9954a6e5ae43c6e602d764a597
5 files changed