[tests] Mark regression test as slow

Change-Id: Idbee9b7b8077a9fd2ffa4a2a010ae7d44b98e31e
Reviewed-on: https://chromium-review.googlesource.com/924198
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51378}

test/mjsunit/mjsunit.status

@@ -87,7 +87,7 @@
   'array-constructor': [PASS, SLOW, ['arch == arm and simulator == True', SKIP]],
 
   # Very slow test
-  'regress/regress-crbug-808192' : [PASS, NO_VARIANTS, ['arch == arm or arch == arm64 or arch == android_arm or arch == android_arm64 or arch == mipsel or arch == mips64el or arch == mips64 or arch == mips or arch == s390 or arch == s390x or arch == ppc or arch == ppc64', SKIP]],
+  'regress/regress-crbug-808192' : [PASS, SLOW, NO_VARIANTS, ['arch == arm or arch == arm64 or arch == android_arm or arch == android_arm64 or arch == mipsel or arch == mips64el or arch == mips64 or arch == mips or arch == s390 or arch == s390x or arch == ppc or arch == ppc64', SKIP]],
 
   # Very slow on ARM and MIPS, contains no architecture dependent code.
   'unicode-case-overoptimization': [PASS, NO_VARIANTS, ['arch == arm or arch == arm64 or arch == android_arm or arch == android_arm64 or arch == mipsel or arch == mips64el or arch == mips64 or arch == mips', SKIP]],