[test] Skip flaky test.

BUG=v8:5553
NOTRY=true
TBR=hablich@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2440693003
Cr-Commit-Position: refs/heads/master@{#40491}

test/mjsunit/mjsunit.status

@@ -793,6 +793,12 @@
   'big-array-literal': [SKIP],
 }],  # 'gcov_coverage'
 
+##############################################################################
+['variant == stress or variant == turbofan_opt', {
+  # BUG(v8:5553).
+  'wasm/grow-memory': [SKIP],
+}],  # variant == stress or variant == turbofan_opt
+
 ##############################################################################
 ['variant == asm_wasm', {
   # Skip stuff uninteresting for asm.js