Revert of bpf_dsl: Change bpf_dsl_unittests into actual standalone unit tests

Revert of bpf_dsl: Change bpf_dsl_unittests into actual standalone unit tests (patchset #3 id:40001 of https://codereview.chromium.org/940693004/)

Reason for revert:
A related CL was reverted. Reverting this to ensure that this does not cause a failure due to the revert.

Original issue's description:
> bpf_dsl: Change bpf_dsl_unittests into actual standalone unit tests
>
> Previously they were more like integration tests that relied on
> seccomp-bpf for installing the policies and executing them via live
> system calls.
>
> BUG=449357
>
> Committed: https://crrev.com/fdb1befee90e6849a1743fcacbe01521261a6366
> Cr-Commit-Position: refs/heads/master@{#317238}

TBR=jln@chromium.org,mdempsky@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=449357
Committed: https://crrev.com/da7202250804e59b1584927bff20f658be70fda2
Cr-Commit-Position: refs/heads/master@{#317285}

[kaliamoorthi, 2015-02-20 11:07:28]

Created Revert of bpf_dsl: Change bpf_dsl_unittests into actual standalone unit
tests

[commit-bot: I haz the power, 2015-02-20 11:08:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/944823002/1

[commit-bot: I haz the power, 2015-02-20 11:08:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-20 11:09:58]

Patchset 1 (id:??) landed as
https://crrev.com/da7202250804e59b1584927bff20f658be70fda2
Cr-Commit-Position: refs/heads/master@{#317285}