Add patched_dart2js_sdk to the dart2js_bot build target

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index ccb5ff2130800dffc1edf1bc4d6dd89fb5f7d485..880c68cf250fce64bd68d0b8baf2b6640f0b75c0 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -111,6 +111,7 @@ group("analysis_server") {
 group("dart2js_bot") {
   deps = [
     ":create_sdk",
+    "utils/compiler:dart2js",

[zra, 2017/07/25 19:30:54]

This target should already be built by the :create_sdk target. Is that not
happening?

[Siggi Cherem (dart-lang), 2017/07/25 19:33:00]

Sorry, this was stupid mistake that I noticed as I turned around to talk with
Stephen and I just fixed in my new patch.

I meant to write patched_dart2js_sdk (which is not a dependency of :dart2js)

   ]
 }