zlib: Update from homebrew/dupes for Linuxbrew
zlib: Update from homebrew/dupes for Linuxbrew

Closes #746.

Signed-off-by: Shaun Jackman <b580dab3251a9622aba3803114310c23fdb42900@gmail.com>

bukzor/linuxbrew,gnubila-france/linuxbrew,SuperNEMO-DBD/cadfaelbrew,bukzor/linuxbrew,SuperNEMO-DBD/cadfaelbrew,drbenmorgan/linuxbrew,reelsense/linuxbrew,ebouaziz/linuxbrew,Linuxbrew/linuxbrew,reelsense/linuxbrew,Linuxbrew/linuxbrew,Angeldude/linuxbrew,sjackman/linuxbrew,ebouaziz/linuxbrew,ebouaziz/linuxbrew,SuperNEMO-DBD/cadfaelbrew,Homebrew/linuxbrew,drbenmorgan/linuxbrew,Linuxbrew/linuxbrew,saketkc/linuxbrew,Angeldude/linuxbrew,sjackman/linuxbrew,bukzor/linuxbrew,gnubila-france/linuxbrew,reelsense/linuxbrew,SuperNEMO-DBD/cadfaelbrew,reelsense/linuxbrew,Homebrew/linuxbrew,saketkc/linuxbrew,sjackman/linuxbrew,drbenmorgan/linuxbrew,ebouaziz/linuxbrew,gnubila-france/linuxbrew,gnubila-france/linuxbrew,Angeldude/linuxbrew,drbenmorgan/linuxbrew,DoomHammer/linuxbrew,saketkc/linuxbrew,DoomHammer/linuxbrew,Linuxbrew/linuxbrew,Homebrew/linuxbrew,bukzor/linuxbrew,Angeldude/linuxbrew,Homebrew/linuxbrew,saketkc/linuxbrew,DoomHammer/linuxbrew,DoomHammer/linuxbrew,sjackman/linuxbrew