Call FS.FileStoreAttributes.setBackground

When setting the asycnhronous background flag, use the
FS.FileStoreAttributes static method directly to avoid loading
unnecessary FS related classes.

Bug: 560528
Change-Id: I4200b7b06de3acaadf58cba542ec13174f6aa190
Signed-off-by: Alex Blewitt <alex.blewitt@gmail.com>
diff --git a/org.eclipse.egit.core/src/org/eclipse/egit/core/Activator.java b/org.eclipse.egit.core/src/org/eclipse/egit/core/Activator.java
index d67d0c9..c9b5196 100644
--- a/org.eclipse.egit.core/src/org/eclipse/egit/core/Activator.java
+++ b/org.eclipse.egit.core/src/org/eclipse/egit/core/Activator.java
@@ -224,7 +224,7 @@
 		super.start(context);
 		pluginId = context.getBundle().getSymbolicName();
 
-		FS.setAsyncFileStoreAttributes(true);
+		FS.FileStoreAttributes.setBackground(true);
 
 		SystemReader.setInstance(
 				new EclipseSystemReader(SystemReader.getInstance()));