Subzero: Fix "make -f Makefile.standalone check-lit FORCEASM=1".

https://codereview.chromium.org/2384983002/ apparently didn't test the full "make presubmit", otherwise this would have been caught.

BUG= none
TBR=jpp@chromium.org

Review URL: https://codereview.chromium.org/2399873003 .
diff --git a/tests_lit/llvm2ice_tests/unreachable.ll b/tests_lit/llvm2ice_tests/unreachable.ll
index 3b0a00f..d8e4420 100644
--- a/tests_lit/llvm2ice_tests/unreachable.ll
+++ b/tests_lit/llvm2ice_tests/unreachable.ll
@@ -52,7 +52,7 @@
 
 ; ARM32-LABEL: divide
 ; ARM32: tst
-; ARM32: udf
+; ARM32: e7fedef0
 ; ARM32: bl {{.*}} __divsi3
 ; ARM32: bx lr