releng: build against Oxygen.1a

+ some version updates
diff --git a/releng/build-scripts/build/run.properties b/releng/build-scripts/build/run.properties
index 9983917..08a3ade 100644
--- a/releng/build-scripts/build/run.properties
+++ b/releng/build-scripts/build/run.properties
@@ -23,12 +23,12 @@
 org.eclipse.equinox.launcher_jar=org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar
 
 # for patching our patch feature to match this version with any suffix:
-jdt.feature.version=3.13.0.v20170531-2000
-jdt.feature.version.next=3.13.0.v20170531-2001
+jdt.feature.version=3.13.1.v20171009-0410
+jdt.feature.version.next=3.13.1.v20171009-411
 
 # jdt.core fragments for extracting pre-built classes and properties:
-jdt.compiler.apt=org.eclipse.jdt.compiler.apt_1.3.0.v20170502-0408.jar
-jdt.compiler.tool=org.eclipse.jdt.compiler.tool_1.2.0.v20170502-0408.jar
+jdt.compiler.apt=org.eclipse.jdt.compiler.apt_1.3.50.v20170920-0950.jar
+jdt.compiler.tool=org.eclipse.jdt.compiler.tool_1.2.50.v20170920-0950.jar
 # -----------------------------------------------------------
 
 #Git Support for PDE BUILD: