[test] Skip tail-call-megatest for tsan

This test gets slower with tsan when the print() calls
in the tests are deleted. It is also only very slow with
crankshaft not with turbofan, but we have no config atm
to only run it with turbofan.

TBR=ishell@chromium.org, ahaas@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/2049993003
Cr-Commit-Position: refs/heads/master@{#36859}

test/mjsunit/mjsunit.status

@@ -253,7 +253,7 @@
   'readonly': [PASS, SLOW],
   'regress/regress-1200351': [PASS, ['mode == debug', SLOW]],
   'regress/regress-crbug-474297': [PASS, ['mode == debug', SLOW]],
-  'es6/tail-call-megatest*': [PASS, FAST_VARIANTS],
+  'es6/tail-call-megatest*': [PASS, SLOW, FAST_VARIANTS, ['tsan', SKIP]],
 
   # TODO(titzer): ASM->WASM tests on these platforms
   'wasm/asm-wasm': [PASS, ['arch in [arm, arm64, mips, mipsel, mips64, mips64el]', SKIP]],