run-build.sh: Apply psa-arch-tests patch from test repo

The patches of psa-arch-tests repo has been moved to the tf-m-tests
repo.

Change-Id: I064b4bdce549af4129a3b2429ded756bd15da800
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
diff --git a/run-build.sh b/run-build.sh
index 572953b..9634761 100755
--- a/run-build.sh
+++ b/run-build.sh
@@ -93,10 +93,10 @@
     cd -
 fi
 
-cnt=$(ls trusted-firmware-m/lib/ext/psa_arch_tests/*.patch 2> /dev/null | wc -l)
+cnt=$(ls tf-m-tests/tests_psa_arch/fetch_repo/*.patch 2> /dev/null | wc -l)
 if [ "$cnt" != "0" ] ; then
     cd psa-arch-tests
-    git apply ../trusted-firmware-m/lib/ext/psa_arch_tests/*.patch
+    git apply ../tf-m-tests/tests_psa_arch/fetch_repo/*.patch
     cd -
 fi