[LLGA] update backend to latest dev-graph branch (#28)

chunyuan-w · web-flow · commit c837979b10e2 · 2021-05-19T17:49:39.000+08:00
diff --git a/third_party/llga b/third_party/llga
@@ -1 +1 @@
-Subproject commit f561318656dd3217a74015a1b870d850275930f0
+Subproject commit d22350581357b57eaf1d4b2b31e3b4b85c5576d2
