Do not test debug-scripts-request with TurboFan.

This test has been failing flakily on gc-stress, only with --turbo-filter=*

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1024483002

Cr-Commit-Position: refs/heads/master@{#27294}

test/mjsunit/mjsunit.status

@@ -108,6 +108,7 @@
   'debug-stepout-scope-part1': [PASS, NO_VARIANTS],
   'debug-stepout-scope-part2': [PASS, NO_VARIANTS],
   'debug-stepout-scope-part3': [PASS, NO_VARIANTS],
+  'debug-scripts-request': [PASS, NO_VARIANTS],
   'es6/debug-stepin-microtasks': [PASS, NO_VARIANTS],
   'es6/debug-stepnext-for': [PASS, NO_VARIANTS],
   'es6/debug-evaluate-blockscopes': [PASS, NO_VARIANTS],