[498599] Add WTP.setup as container of child setups

Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=498599


Change-Id: Id6c770cf66ab7a6d28c43eaede0fa5215f92c0a8
Signed-off-by: Esteban DUGUEPEROUX <esteban.dugueperoux@gmail.com>

installer/WTP.setup

+<?xml version="1.0" encoding="UTF-8"?>
+<setup:Project
+    xmi:version="2.0"
+    xmlns:xmi="http://www.omg.org/XMI"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:setup="http://www.eclipse.org/oomph/setup/1.0"
+    name="wtp"
+    label="WTP">
+  <project href="https://git.eclipse.org/c/jsdt/webtools.jsdt.git/plain/releng/org.eclipse.wst.jsdt.releng/JSDT.setup#/"/>
+</setup:Project>