setup: use share/man/man1 for man1 files
use share/man/man1 for man files to conform GNU layout, https://www.gnu.org/software/make/manual/html_node/Directory-Variables.html#prefix
relates to https://github.com/Homebrew/homebrew-core/pull/138356
use share/man/man1 for man files to conform GNU layout, https://www.gnu.org/software/make/manual/html_node/Directory-Variables.html#prefix
relates to https://github.com/Homebrew/homebrew-core/pull/138356