Revert "Remove smoke and observe from SDK DEPS"

.packages

Index: .packages
diff --git a/.packages b/.packages
index 6e1fe192f279fb27586ca630b7ed071be505b4e2..721c67e380f7a98b1fe348015d7900238498f6dd 100644
--- a/.packages
+++ b/.packages
@@ -63,6 +63,7 @@ mime:third_party/pkg/mime/lib
 mustache4dart:third_party/pkg/mustache4dart/lib
 oauth2:third_party/pkg/oauth2/lib
 observatory:runtime/observatory/lib
+observe:third_party/pkg/observe/lib
 package_config:third_party/pkg_tested/package_config/lib
 package_resolver:third_party/pkg_tested/package_resolver/lib
 path:third_party/pkg/path/lib
@@ -80,6 +81,7 @@ shelf:third_party/pkg/shelf/lib
 shelf_packages_handler:third_party/pkg/shelf_packages_handler/lib
 shelf_static:third_party/pkg/shelf_static/lib
 shelf_web_socket:third_party/pkg/shelf_web_socket/lib
+smoke:third_party/pkg/smoke/lib
 source_map_stack_trace:third_party/pkg/source_map_stack_trace/lib
 source_maps:third_party/pkg/source_maps/lib
 source_span:third_party/pkg/source_span/lib