pkg:build_integration: clarify that' it's not planned to be published

Update front_end and vm deps to be path dependencies

Change-Id: I5cd6b80bab6ae5f2ddfa986abf2b0af5369cab1a
Reviewed-on: https://dart-review.googlesource.com/61907
Reviewed-by: Sigmund Cherem <sigmund@google.com>

pkg/build_integration/pubspec.yaml

@@ -1,9 +1,9 @@
 name: build_integration
-version: 0.0.1
-author: Dart Team <misc@dartlang.org>
 description: >
   Libraries for integrating Dart tools with build systems like bazel
   and build_runner.
-homepage: https://github.com/dart-lang/sdk/tree/master/pkg/build_integration
+# This package is not intended to be published - yet
+publish_to: none
+
 dependencies:
   front_end: ^0.1.0

pkg/front_end/pubspec.yaml

@@ -20,7 +20,8 @@ dependencies:
 dev_dependencies:
   analyzer: '>=0.31.0 <0.33.0'
   args: '>=0.13.0 <2.0.0'
-  build_integration: ^0.0.1
+  build_integration:
+    path: ../build_integration
   dart_style: '^1.0.7'
   json_rpc_2: ^2.0.4
   mockito: ^2.0.2

pkg/vm/pubspec.yaml

@@ -1,13 +1,13 @@
+# This package is not intended to be published.
 name: vm
-version: 0.1.0-alpha.1
-author: Dart Team <misc@dartlang.org>
+# version: do-not-upload
 description: VM specific Dart code and helper scripts
-homepage: https://github.com/dart-lang/sdk/tree/master/pkg/vm
-environment:
-  sdk: ">=1.8.0 <2.0.0"
+
 dependencies:
-  build_integration: 0.0.1
+  build_integration:
+    path: ../build_integration
   front_end: 0.1.0-alpha.6
   kernel: 0.3.0-alpha.3
+
 dev_dependencies:
   args: ^0.13.0