Bump http package to fix gclient

Change-Id: I8b44dfc5d59439ac4c635c3dfa15bda020e9bd57
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/98722
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
diff --git a/DEPS b/DEPS
index abf461b..fe36b90 100644
--- a/DEPS
+++ b/DEPS
@@ -89,7 +89,7 @@
   "http_multi_server_tag" : "2.0.5",
   "http_parser_tag" : "3.1.3",
   "http_retry_tag": "0.1.1",
-  "http_tag" : "0.12.0",
+  "http_tag" : "0.12.0+2",
   "http_throttle_tag" : "1.0.2",
   "idl_parser_rev": "5fb1ebf49d235b5a70c9f49047e83b0654031eb7",
   "intl_tag": "0.15.7",