Disable CertVerifyProcTest TestKnownRoot and PublicKeyHashes
Disable CertVerifyProcTest TestKnownRoot and PublicKeyHashes

Comment in TestKnownRoot indicates that it and PublicKeyHashes will
fail on May 9, 2016, and they did. Disabling for now.

BUG=610546
TBR=agl@chromium.org
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/1959083003
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#392503}

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