configure/meson: make protoc 3.4.1 compatible with protobuf 3.4.0

protoc 3.4.1 reports using libprotoc 3.4.0 instead of 3.4.1. That's the only release before 3.22 with a minor release version not reported properly by protoc. After that we get the proper report:

• libprotoc 3.19.5
• libprotoc 3.12.4
• libprotoc 3.6.1
• libprotoc 3.5.1

And before 3.4.1 there were no minor 3.x release versions.

Versions 3.1 to 3.22 are considered to version 1 to 22. 3.22.x then switched to 22.x.