mhash: regenerate `configure` (#87878)
mhash: regenerate `configure` (#87878)

Their configure script is very old and isn't suitable for modern
versions of macOS. Let's fix that by regenerating it with Autotools.

This is needed for bottling on Monterey.

Closes #87800.
zyedidia/homebrew-core,cblecker/homebrew-core,makigumo/homebrew-core,uyjulian/homebrew-core,filcab/homebrew-core,nandub/homebrew-core,sjackman/homebrew-core,uyjulian/homebrew-core,nandub/homebrew-core,chrisfinazzo/homebrew-core,mfikes/homebrew-core,adam-moss/homebrew-core,nbari/homebrew-core,nbari/homebrew-core,Homebrew/homebrew-core,sjackman/homebrew-core,zyedidia/homebrew-core,Homebrew/homebrew-core,filcab/homebrew-core,mfikes/homebrew-core,makigumo/homebrew-core,stgraber/homebrew-core,lemzwerg/homebrew-core,chrisfinazzo/homebrew-core,adam-moss/homebrew-core,stgraber/homebrew-core,cblecker/homebrew-core,lemzwerg/homebrew-core