Link the shared library tests to the shared library, correctly.
Link the shared library tests to the shared library, correctly.

Fixes issue 18.

R=rsc
CC=re2-dev
http://codereview.appspot.com/992042

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@swtch.com>

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