Otherwise, it might find the binary in .libs which can cause it to use
the system libcurl which can fail. This error is only visible by
noticing that the test is skipped.
Follow-up to e4dfe6fc
Ref: #10651
When returned from the CURLOPT_SOCKOPTFUNCTION, like when we have a
custom socket connected in the app, passed in to libcurl.
Verifies the fix in #10648Closes#10651