[mpact][torch-mlir] bump torch-mlir version (#45)

diff --git a/externals/torch-mlir b/externals/torch-mlir
index 919b599..c7d52f6 160000
--- a/externals/torch-mlir
+++ b/externals/torch-mlir
@@ -1 +1 @@
-Subproject commit 919b599ebe57b1402b1aca21fa54799cc1e0cd91
+Subproject commit c7d52f63b482b2c30f4efb435ce0cc2efeab25d9