Declare dependency from dart_io targets to zlib

runtime/bin/BUILD.gn

Index: runtime/bin/BUILD.gn
diff --git a/runtime/bin/BUILD.gn b/runtime/bin/BUILD.gn
index fd47d214c87343a9efcd7de3fde711e5a51ba4f3..b3fc97bdf75fcec876fb3431b80033ab89a03314 100644
--- a/runtime/bin/BUILD.gn
+++ b/runtime/bin/BUILD.gn
@@ -404,6 +404,9 @@ template("dart_io") {
     set_sources_assignment_filter(custom_sources_filter)
 
     defines = []
+    deps = [
+      "$dart_zlib_path",
+    ]
     if (is_mac || is_ios) {
       libs = [
         "CoreFoundation.framework",
@@ -414,7 +417,7 @@ template("dart_io") {
         libs += [ "CoreServices.framework" ]
       }
     } else {
-      deps = [
+      deps += [
         "//third_party/boringssl",
       ]
     }