Auto merge of #948 - nathan-at-least:t946.fix-cov-zcash, r=nathan-at-least
Auto merge of #948 - nathan-at-least:t946.fix-cov-zcash, r=nathan-at-least

Fix a test name bug so that ``make cov-zcash`` correctly runs the ``zcash-gtest`` binary. Fixes #946.

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