Update LLVM submodule

petrochenkov · petrochenkov · commit 8468840a5631 · 2023-12-20T16:50:43.000+03:00
to pick up "[M68k] Fix ODR violation in GISel code (#72797)" rust-lang/llvm-project#159
diff --git a/src/llvm-project b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 2c4de6c2492d5530de3f19f41d8f88ba984c2fe2
+Subproject commit 606bc11367b475542bd6228163424ca43b4dbdbc
