quick backup - everything is going to be changed on vulkan side.

[demo] / external / libimago

diff --git a/external/libimago b/external/libimago
index 2228b92..6d5b91d 160000 (submodule)
--- a/external/libimago
+++ b/external/libimago
@@ -1 +1 @@
-Subproject commit 2228b925b87ee5458bd59611c11fc98c051446cc
+Subproject commit 6d5b91de61e8710324852a356d1b7704fc22596c