Update clang version requirements

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 91d0a25..d84bdb7 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -4394,7 +4394,7 @@
 support_build_aes_armce() {
     # clang >= 4 is required to build with AES extensions
     ver="$(clang --version|grep version|sed -E 's#.*version ([0-9]+).*#\1#')"
-    [ "${ver}" -ge 4 ]
+    [ "${ver}" -ge 11 ]
 }
 
 component_build_aes_armce () {