Update the gost-engine submodule

Fixes #11949
[extended tests]

Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/11951)

diff --git a/gost-engine b/gost-engine
index 7f055baddc3aa79fc1c2cf22bf5d5750843f5920..a90ad6ce8f4cd876b5a8897b66ef49fb50b378cd 160000 (submodule)
--- a/gost-engine
+++ b/gost-engine
@@ -1 +1 @@
-Subproject commit 7f055baddc3aa79fc1c2cf22bf5d5750843f5920
+Subproject commit a90ad6ce8f4cd876b5a8897b66ef49fb50b378cd