Bump binary-reference-assemblies

diff --git a/external/binary-reference-assemblies b/external/binary-reference-assemblies
index de108cd39453ff4accc0967b7ae2490b43a79c30..6c77197318fe85dfddf75a1b344b9bf8d0007b0b 160000 (submodule)
--- a/external/binary-reference-assemblies
+++ b/external/binary-reference-assemblies
@@ -1 +1 @@
-Subproject commit de108cd39453ff4accc0967b7ae2490b43a79c30
+Subproject commit 6c77197318fe85dfddf75a1b344b9bf8d0007b0b