Bug 570132: Add search keywords for new parallel index search preference

Change-Id: I7f3fe482d13cbdce2f4ad794937173e3beb3a1e7
diff --git a/org.eclipse.jdt.ui/plugin.properties b/org.eclipse.jdt.ui/plugin.properties
index 25bb938..faaaac8 100644
--- a/org.eclipse.jdt.ui/plugin.properties
+++ b/org.eclipse.jdt.ui/plugin.properties
@@ -97,7 +97,7 @@
 javadocLocationPageName=Javadoc Location
 javaCompilerPageName=Java Compiler
 
-preferenceKeywords.general=Java package explorer call type hierarchy refactoring rename editor search index
+preferenceKeywords.general=Java package explorer call type hierarchy refactoring rename editor search index parallel performance
 preferenceKeywords.appearance=Java appearance package explorer browsing compress show method return types categories members test
 preferenceKeywords.sortorder=Java member sort order appearance
 preferenceKeywords.typefilter=Java type filter ignore package appearance content assist