nixpkgs: openresty 1.7.4.1rc1

Signed-off-by: Austin Seipp <aseipp@pobox.com>
nixpkgs: libressl 2.0.5

Signed-off-by: Austin Seipp <aseipp@pobox.com>
re2c: 0.13.6 -> 0.13.7.4

Signed-off-by: Austin Seipp <aseipp@pobox.com>
ninja: 1.4.0 -> 1.5.1

Signed-off-by: Austin Seipp <aseipp@pobox.com>
nixpkgs: boringssl 20140820-a7d1363f

Signed-off-by: Austin Seipp <aseipp@pobox.com>