[test] Skip slow test

TBR=jgruber@chromium.org
NOTRY=true

Bug: v8:8789
Change-Id: I4058cf0ad32b0dfac313fce41f2ee58f65331f9a
Reviewed-on: https://chromium-review.googlesource.com/c/1454610Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59386}

test/benchmarks/benchmarks.status

@@ -43,6 +43,11 @@
   'octane/typescript': [SKIP],
 }],
 
+['variant == jitless', {
+  # Too slow for jitless mode.
+  'octane/zlib': [SKIP],
+}],
+
 ['gc_fuzzer', {
   # Too slow for gc fuzzing.
   'octane/earley-boyer' : [PASS, SLOW, ['mode == debug', SKIP]],