[turbofan] Better handling of empty type in simplified lowering.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 7ce8286cf4805609ffd7dece508a8932e63adb8b..5d6c7178c4516b267a388f909d9568331d5aa97b 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -251,7 +251,7 @@
   'debug-scopes': [PASS, SLOW],
   'numops-fuzz-part*': [PASS, ['mode == debug', SLOW]],
   'readonly': [PASS, SLOW],
-  'regress/regress-1200351': [PASS, ['mode == debug', SLOW]],
+  'regress/regress-1200351': [PASS, SLOW],
   'regress/regress-crbug-474297': [PASS, ['mode == debug', SLOW]],
   'es6/tail-call-megatest*': [PASS, SLOW, FAST_VARIANTS, ['tsan', SKIP]],
 
@@ -414,12 +414,6 @@
 }],  # 'gc_stress == True'
 
 ##############################################################################
-['no_i18n == True and mode == debug', {
-  # Tests too slow for no18n debug.
-  'regress/regress-1200351': [SKIP],
-}],  # 'no_i18n == True and mode == debug'
-
-##############################################################################
 ['byteorder == big', {
   # Emscripten requires little-endian, skip all tests on big endian platforms.
   'asm/embenchen/*': [SKIP],