Use IFileStore.getFileStore(Path) instead of deprecated getChild(Path).

Change-Id: I6f9401bb7934b20fc06268c958d1e3e2362b5cf6
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/core/plugins/org.eclipse.dltk.core/environment/org/eclipse/dltk/core/internal/environment/EFSFileHandle.java b/core/plugins/org.eclipse.dltk.core/environment/org/eclipse/dltk/core/internal/environment/EFSFileHandle.java
index a3ba37a..ede4800 100644
--- a/core/plugins/org.eclipse.dltk.core/environment/org/eclipse/dltk/core/internal/environment/EFSFileHandle.java
+++ b/core/plugins/org.eclipse.dltk.core/environment/org/eclipse/dltk/core/internal/environment/EFSFileHandle.java
@@ -69,7 +69,7 @@
 	@Override
 	public IFileHandle getChild(final String childname) {
 		return new EFSFileHandle(environment, file
-				.getChild(new Path(childname)));
+				.getFileStore(new Path(childname)));
 	}
 
 	@Override