Releng: update jdt.core to I20181206-0815 (candidate 4.10 RC2)

Change-Id: Ida2cdecd963b8c11ba64ac6daad63ec951baa282
diff --git a/org.eclipse.jdt.core/.options b/org.eclipse.jdt.core/.options
index 1549d65..443e2fd 100644
--- a/org.eclipse.jdt.core/.options
+++ b/org.eclipse.jdt.core/.options
@@ -1,5 +1,5 @@
 # Turn on debug tracing for org.eclipse.jdt.core plugin
-org.eclipse.jdt.core/debug=true
+org.eclipse.jdt.core/debug=false
 
 # Reports buffer manager activity
 org.eclipse.jdt.core/debug/buffermanager=false