openssl@1.1: re-parallelise build/install (#76174)
openssl@1.1: re-parallelise build/install (#76174)

The issues around parallel builds were resolved in 2018 via
https://github.com/openssl/openssl/pull/7583 and the referenced
commits.

Sadly the tests still take 45 years to get through but this fairly
significantly speeds up the build time.

Before:
==> Summary
/opt/homebrew/Cellar/openssl@1.1/1.1.1k: 8,064 files, 17.9MB, built in 7 minutes 40 seconds

After:
==> Summary
/opt/homebrew/Cellar/openssl@1.1/1.1.1k: 8,064 files, 17.9MB, built in 4 minutes 35 seconds
filcab/homebrew-core,chrisfinazzo/homebrew-core,Linuxbrew/homebrew-core,zyedidia/homebrew-core,Moisan/homebrew-core,Homebrew/homebrew-core,sjackman/homebrew-core,lemzwerg/homebrew-core,nandub/homebrew-core,uyjulian/homebrew-core,lemzwerg/homebrew-core,sjackman/homebrew-core,JCount/homebrew-core,uyjulian/homebrew-core,adam-moss/homebrew-core,mbcoguno/homebrew-core,stgraber/homebrew-core,chrisfinazzo/homebrew-core,mfikes/homebrew-core,mfikes/homebrew-core,makigumo/homebrew-core,mbcoguno/homebrew-core,JCount/homebrew-core,filcab/homebrew-core,nbari/homebrew-core,nandub/homebrew-core,cblecker/homebrew-core,cblecker/homebrew-core,zyedidia/homebrew-core,makigumo/homebrew-core,adam-moss/homebrew-core,Homebrew/homebrew-core,stgraber/homebrew-core,Moisan/homebrew-core,mbcoguno/homebrew-core,nbari/homebrew-core,Linuxbrew/homebrew-core