Bug 507292 - Create platform porting guide for 4.7 and update links in

Welcome page

See also https://git.eclipse.org/r/#/c/84801/

Change-Id: I6ba5e50bffb52abafd20f55c5f4bc77fbd8e2178
Signed-off-by: Sopot Cela <scela@redhat.com>
diff --git a/org.eclipse.jdt/intro/migrateExtensionContent.xml b/org.eclipse.jdt/intro/migrateExtensionContent.xml
index 3ae62a4..eb49f6d 100644
--- a/org.eclipse.jdt/intro/migrateExtensionContent.xml
+++ b/org.eclipse.jdt/intro/migrateExtensionContent.xml
@@ -3,8 +3,8 @@
   <!-- Extension to the SDK Migration Page. -->
   <extensionContent id="org.eclipse.jdt" name="Java development tools" alt-style="css/migrate.properties" style="css/migrate.css" path="migrate/@">
      <group id="content-group" style-id="content-group">
-    	<link style-id="content-link" label="Java development tools" url="http://org.eclipse.ui.intro/showHelpTopic?id=/org.eclipse.jdt.doc.isv/porting/eclipse_4_6_porting_guide.html" id="java">
-      		<text>Eclipse JDT Neon (4.6) Plug-in Migration Guide</text>
+    	<link style-id="content-link" label="Java development tools" url="http://org.eclipse.ui.intro/showHelpTopic?id=/org.eclipse.jdt.doc.isv/porting/eclipse_4_7_porting_guide.html" id="java">
+      		<text>Eclipse JDT Oxygen (4.7) Plug-in Migration Guide</text>
     	</link>
      </group>
   </extensionContent>