LLVM: Update submodule to include patches for MSP430.

Fixes #37829

diff --git a/src/llvm b/src/llvm
index 3ec14daffb4b8c0604df50b7fb0ab552f456e381..d7342a9a957470bb62c890cf88fc655ccfb755cc 160000 (submodule)
--- a/src/llvm
+++ b/src/llvm
@@ -1 +1 @@
-Subproject commit 3ec14daffb4b8c0604df50b7fb0ab552f456e381
+Subproject commit d7342a9a957470bb62c890cf88fc655ccfb755cc