Buck: Adapt GWT plugins to changed lib name

Change-Id: I779c1386a38966d80b4d1bab172dd1d1463778b1
diff --git a/tools/gwt-constants.defs b/tools/gwt-constants.defs
index ae93934..75c7503 100644
--- a/tools/gwt-constants.defs
+++ b/tools/gwt-constants.defs
@@ -7,6 +7,6 @@
 ]
 
 GWT_PLUGIN_DEPS = [
-  '//gerrit-plugin-gwtui:gwtui-api',
+  '//gerrit-plugin-gwtui:gwtui-api-lib',
   '//lib/gwt:user',
 ]