Buck: Move gwt-dev transitive deps to first order dependency

Since bottom-up to top-down graph traversal switch in Buck, only
first order dependencies are built per default. This leads to a
problem when gerrit is built without --deep option (per default).

Move gwt-dev dependencies to gwt_binary() rules.

The correct fix for this issue would be to model the GWT compiler
as a tool, and ensure that its transitive deps are added as first
order deps of the gwt_binary() rules: [1]. Put this workaround for
now in tree and fix build breakages. We can always improve things
when Buck supports that new model.

Test plan:

* buck clean
* change one of GWT classes
* buck build //gerrit-gwtui:ui_opt
* buck build api_install

[1] https://github.com/facebook/buck/issues/469

Change-Id: I4212ac327acd27f33256c1ba1e86c0b098e07a93
diff --git a/tools/gwt-constants.defs b/tools/gwt-constants.defs
index 2584f2d..8bafddb 100644
--- a/tools/gwt-constants.defs
+++ b/tools/gwt-constants.defs
@@ -12,3 +12,13 @@
   '//gerrit-plugin-gwtui:gwtui-api-lib',
   '//lib/gwt:user',
 ]
+
+GWT_TRANSITIVE_DEPS = [
+  '//lib/gwt:javax-validation',
+  '//lib/gwt:javax-validation_src',
+  '//lib/ow2:ow2-asm',
+  '//lib/ow2:ow2-asm-analysis',
+  '//lib/ow2:ow2-asm-commons',
+  '//lib/ow2:ow2-asm-tree',
+  '//lib/ow2:ow2-asm-util',
+]