Get rid of unicode quotes (#1140)

corepkgs/derivation.nix

mk/functions.mk

mk/libraries.mk

mk/programs.mk

mk/templates.mk

mk/tests.mk

perl/lib/Nix/Config.pm.in

perl/lib/Nix/CopyClosure.pm

perl/lib/Nix/Manifest.pm

perl/lib/Nix/SSH.pm

perl/lib/Nix/Utils.pm

scripts/build-remote.pl.in

scripts/install-nix-from-closure.sh

scripts/nix-copy-closure.in

src/buildenv/buildenv.cc

src/download-via-ssh/download-via-ssh.cc

src/libexpr/attr-path.cc

src/libexpr/common-opts.cc

src/libexpr/eval.cc

src/libexpr/eval.hh