[test] Fix space in test expectation

BUG=v8:5598
TBR=adamk@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2479793003
Cr-Commit-Position: refs/heads/master@{#40750}

test/cctest/cctest.status

@@ -361,7 +361,7 @@
   'test-sampler-api/StackFramesConsistent': [FAIL],
 
   # BUG(v8:5457)
-  'test-api/SetJitCodeEventHandler ': [PASS, ['no_snap', SKIP]],
+  'test-api/SetJitCodeEventHandler': [PASS, ['no_snap', SKIP]],
 }],  # variant == turbofan_opt
 
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