invert anchor order to trigger anchor_test.py fail

In anchor_propagation.py, we have code to adjust propagated anchor position when a mark component is anchored to a specific named anchor as specified in the ComponentInfo lib key.
The code indiscriminately applies the adjustment in a for loop, without checking the anchor names match the expected component anchor.
I modified one of the AnchorPropagation.glyphs test file by changing the order of anchors in a mark glyph used as component in order to trigger a failure. Will follow up with a fix

tests/data/AnchorPropagation.glyphs

@@ -1371,13 +1371,13 @@ layers = (
 {
 anchors = (
 {
+name = top;
+position = "{129, 252}";
+},
+{
 name = _top;
 position = "{130, -70}";
 },
-{
-name = top;
-position = "{129, 252}";
-}
 );
 components = (
 {