Added zlib dependency to std.

modules/std/module.json

@@ -4,5 +4,5 @@
 	"author":"Mark Sibly",
 	"version":"1.0.0",
 	"support":"http://monkeycoder.co.nz",
-	"depends":["libc","jni","sdl2","miniz","stb-image","stb-image-write","stb-vorbis"]
+	"depends":["libc","jni","sdl2","miniz","stb-image","stb-image-write","stb-vorbis","zlib"]
 }