Fix a crypto test failure on Linux.

The test was generating an RSA-OAEP keypair using a public exponent of "000" and expecting a failure. The issue is that RSA-OAEP depends on a newer version of NSS and is therefore not supported by the Linux test runners.

R=rsleevi@chromium.org

BUG=376432

Review URL: https://codereview.chromium.org/298803011

git-svn-id: svn://svn.chromium.org/blink/trunk@174592 bbb929c8-8fbe-4397-9dbb-9b2b20218538