Merge pull request #1210 from billhollings/update-spirv-cross

Update to latest SPIRV-Cross to fix conversion regression edge case.
diff --git a/ExternalRevisions/SPIRV-Cross_repo_revision b/ExternalRevisions/SPIRV-Cross_repo_revision
index f065f1e..e1ad29a 100644
--- a/ExternalRevisions/SPIRV-Cross_repo_revision
+++ b/ExternalRevisions/SPIRV-Cross_repo_revision
@@ -1 +1 @@
-762c3082ae65e43f1c4f11546a21d3f9c1317160
+9acb9ec31f5a8ef80ea6b994bb77be787b08d3d1