Correcting the build target `coverage` for enabled SSL (#1009)
Correcting the build target `coverage` for enabled SSL (#1009)

* Exclude includes from /usr in coverage reporting

* Correct build target `coverage` for enabled ssl

`USE_SSL=1 make coverage` will now build the test binary with the
forwarded define HIREDIS_TEST_SSL. This avoids inconsistency between
built test binary and the testrunner `test.sh`.
This enables test coverage measurements for SSL too.
redis/hiredis,redis/hiredis,redis/hiredis