There's a merged pull request on the void-packages repository

rng-tools: fix configure to work with new jitterentropy library.
https://github.com/void-linux/void-packages/pull/26933

Description:
The recent update to the jitterentropy library broke rng-tools
configure. This patch fixes it. The source is the upstream commit:
https://github.com/nhorman/rng-tools/commit/daff4e2dd9d3abb74829f41e72607681163bd309.