glibc: Fix the postinstall for Linuxbrew
glibc: Fix the postinstall for Linuxbrew

patchelf_formula locks the keg. Since binutils is a dependency of
glibc, it's already locked, is unable to obtain the lock and fails.

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