clone.sh: Parse PSA arch tests version from tf-m-tests

In TF-M split build system, version of PSA arch tests is set in
tf-m-tests. So parse PSA arch tests version and clone the repo after
tf-m-tests being cloned.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I2eb23ab1ca21f781742c846329e09ecce678e015
1 file changed