[test] Skip some debugger tests under stress_incremental_marking

NOTRY=true

Bug: chromium:772010
Change-Id: I510121accd739f1b8239720154d45846e83b3662
Reviewed-on: https://chromium-review.googlesource.com/704818Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48340}

test/debugger/debugger.status

@@ -43,6 +43,12 @@
   'regress/regress-2318': [SKIP],
 }],  # variant == stress
 
+##############################################################################
+['variant == stress_incremental_marking', {
+  # BUG(chromium:772010).
+  'debug/debug-*': [PASS, ['system == windows', SKIP]],
+}],  # variant == stress_incremental_marking
+
 ##############################################################################
 ['gc_stress == True', {
   # Skip tests not suitable for GC stress.