Disable primes with asm->wasm as it fails under gc-stress.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/wasm/embenchen
R=titzer@chromium.org,aseemgarg@chromium.org
LOG=N
NOTRY=true

Review URL: https://codereview.chromium.org/1758373002

Cr-Commit-Position: refs/heads/master@{#34468}

test/mjsunit/mjsunit.status

@@ -318,6 +318,7 @@
   'wasm/embenchen/copy': [FAIL],  # wrong answer
   'wasm/embenchen/box2d': [SKIP],   # hang
   'wasm/embenchen/lua_binarytrees': [SKIP],  # fails decode
+  'wasm/embenchen/primes': [SKIP],  # crashes under gc-stress
   'wasm/embenchen/fannkuch': [SKIP],  # crash (seems to be gc issue)
   'wasm/embenchen/fasta': [SKIP],  # flaky crash
   'wasm/embenchen/zlib': [SKIP],  # flaky crash