Fix earthdistance test suite function name typo.

Noah Misch <noah@leadboat.com>

Commit: fb17eabf1b513614946bfc37125c83db197d2c68
Author: Noah Misch <noah@leadboat.com>
Date: 2018-07-29T19:02:07Z
Releases: 12.0
Fix earthdistance test suite function name typo.

Affected test queries have been testing the wrong thing since their
introduction in commit 4c1383efd132e4f532213c8a8cc63a455f55e344.
Back-patch to 9.3 (all supported versions).

Files