Fix typo

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 730c804..23615f2 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -3504,7 +3504,7 @@
 }
 
 support_test_aesni () {
-    # require an x64_64 target
+    # require an x86_64 target
     gcc -v 2>&1 | grep Target | grep -q x86_64
 }