main/openrc: backport committed seedrng patch instead of intermediate one
The seedrng patch was committed from an intermediate version in the PR, not the final. So, this commit updates it to the one that was actually committed.
Upstream PR: OpenRC/openrc#507 Upstream Patch: https://github.com/OpenRC/openrc/commit/076c2552aeff88a27fe275dfaae61dedf4bb4bd5