update reference to compiler/coq subproject

diff --git a/compiler/coq b/compiler/coq
index a764632..11f5f9e 160000 (submodule)
--- a/compiler/coq
+++ b/compiler/coq
@@ -1 +1 @@
-Subproject commit a764632d29c79933e8c54633831e4aac0fb204f6
+Subproject commit 11f5f9e762626272e8d339d8e6edad514e536041