manifest: Propagate revision attribute through multiple levels of include

Make sure a revision attribute for an include element is propagated
through multiple levels of manifest includes.

Change-Id: If37d65b0cd47da673719976598175d0eb6b7cbbe
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/525341
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Commit-Queue: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>

manifest_xml.py

@@ -1305,6 +1305,14 @@ https://gerrit.googlesource.com/git-repo/+/HEAD/docs/manifest-format.md
 
         nodes = []
         for node in manifest.childNodes:
+            if (
+                parent_node
+                and node.nodeName in ("include", "project")
+                and not node.hasAttribute("revision")
+            ):
+                node.setAttribute(
+                    "revision", parent_node.getAttribute("revision")
+                )
             if node.nodeName == "include":
                 name = self._reqatt(node, "name")
                 if restrict_includes:
@@ -1349,14 +1357,6 @@ https://gerrit.googlesource.com/git-repo/+/HEAD/docs/manifest-format.md
                             node.getAttribute("groups")
                         )
                     node.setAttribute("groups", ",".join(sorted(nodeGroups)))
-                if (
-                    parent_node
-                    and node.nodeName == "project"
-                    and not node.hasAttribute("revision")
-                ):
-                    node.setAttribute(
-                        "revision", parent_node.getAttribute("revision")
-                    )
                 nodes.append(node)
         return nodes