[test] Skip slow tests.

TBR=hablich@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1307123003

Cr-Commit-Position: refs/heads/master@{#30494}

test/mozilla/mozilla.status

@@ -851,6 +851,15 @@
 }],  # ALWAYS
 
 
+['no_i18n == True and mode == debug', {
+  # Tests too slow for no18n debug.
+  'ecma_3/Statements/regress-302439': [FAST_VARIANTS],
+  'js1_5/Regress/regress-98901': [FAST_VARIANTS],
+  'ecma_3/RegExp/perlstress-001': [FAST_VARIANTS],
+  'js1_5/extensions/regress-311161': [FAST_VARIANTS],
+}],  # 'no_i18n == True and mode == debug'
+
+
 ['arch == arm or arch == arm64', {
 
   # BUG(3251229): Times out when running new crankshaft test script.