build against Eclipse 4.12

Signed-off-by: nickboldt <nboldt@redhat.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index e5ce667..02482a4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
 
       <!-- Set up the default target platform to build against -->
       <license-site>http://download.eclipse.org/cbi/updates/license</license-site>
-      <platform-repo.url>http://download.eclipse.org/eclipse/updates/4.11-I-builds/</platform-repo.url>
+      <platform-repo.url>http://download.eclipse.org/eclipse/updates/I-builds/</platform-repo.url>
       <!-- <orbit-repo.url>http://download.eclipse.org/tools/orbit/I-builds/I20180829144012/repository/</orbit-repo.url> -->
       <orbit-repo.url>http://download.eclipse.org/tools/orbit/downloads/latest-I/</orbit-repo.url>
       <emf-site>http://download.eclipse.org/modeling/emf/emf/updates/2.14milestones/</emf-site>