Remove org.json:json and fix gwt-dev deps

GWT 2.7 dev JAR no longer lists org.json:json as a dep in its pom.xml
file.  Instead it requests ow2-asm.  Fix the dep list to drop the
difficult org.json:json and put in the requested ow2 JARs.

Move ow2-asm deps down onto gwt-dev JAR where they belong.  These are
required by the compiler code inside gwt-dev, not user code linked
with gwt_module().

Change-Id: I54df92daf40d77e61bed4ed4b549981e8d798ca1

tools/gwt-constants.defs

diff --git a/tools/gwt-constants.defs b/tools/gwt-constants.defs
index 972dca5..2584f2d 100644
--- a/tools/gwt-constants.defs
+++ b/tools/gwt-constants.defs
@@ -8,14 +8,7 @@
   '-XdisableCastChecking',
 ]
 
-GWT_COMMON_DEPS = [
-  '//lib/ow2:ow2-asm',
-  '//lib/ow2:ow2-asm-analysis',
-  '//lib/ow2:ow2-asm-util',
-  '//lib/ow2:ow2-asm-tree',
-]
-
-GWT_PLUGIN_DEPS = GWT_COMMON_DEPS + [
+GWT_PLUGIN_DEPS = [
   '//gerrit-plugin-gwtui:gwtui-api-lib',
   '//lib/gwt:user',
 ]