fix: use correct variable for SOVERSION (#4131)
fix: use correct variable for SOVERSION (#4131)

Fixes: #4128

Thanks to @sjoubert for reporting this.

I also filed #4132 to set up a CI build to detect issues like this in the future.
googleapis/google-cloud-cpp,googleapis/google-cloud-cpp,googleapis/google-cloud-cpp,googleapis/google-cloud-cpp