prod: fix timezone conversion from AppEngine layer

impl/prod/raw_datastore_type_converter.go

Index: impl/prod/raw_datastore_type_converter.go
diff --git a/impl/prod/raw_datastore_type_converter.go b/impl/prod/raw_datastore_type_converter.go
index 022ae04fe8f8df58c582d09e4968ba372cf79291..0543326492c450ebe6e665b180d17ed741b82f1c 100644
--- a/impl/prod/raw_datastore_type_converter.go
+++ b/impl/prod/raw_datastore_type_converter.go
@@ -5,6 +5,8 @@
 package prod
 
 import (
+	"time"
+
 	bs "github.com/luci/gae/service/blobstore"
 	ds "github.com/luci/gae/service/datastore"
 	"google.golang.org/appengine"
@@ -30,6 +32,9 @@ func (tf *typeFilter) Load(props []datastore.Property) error {
 			val = bs.Key(x)
 		case appengine.GeoPoint:
 			val = ds.GeoPoint(x)
+		case time.Time:
+			// "appengine" layer instantiates with Local timezone.

[iannucci, 2015/08/19 21:55:26]

seriously wtf

+			val = x.UTC()
 		}
 		prop := ds.Property{}
 		is := ds.ShouldIndex