Regenerate llvm config headers to correctly enable zlib support

During the initial upgrade to 10.0.0 in r357120, I generated these
headers once, but they were missing zlib-related settings at that time.
These should have been regenerated again during the merge of the final
10.0.0 release.

Direct commit to stable/{11,12}, since head has gotten 10.0.1 in the
mean time, with up-to-date generated headers.

Reported by: hyama99@gmail.com
PR: 246244