[gnome-usage] Update POTFILES.skip

[Piotr Drąg <piotrdrag src gnome org>]

commit f74196dac6fa4d74fe55a1e5d363c233e9fe8b5a
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Wed Feb 22 19:02:40 2017 +0100

    Update POTFILES.skip

 po/POTFILES.skip |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 379cb5c..89e4893 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -8,10 +8,14 @@ src/application.c
 src/cpu-sub-view.c
 src/data-view.c
 src/graph-block.c
+src/graph-stack-switcher.c
 src/memory-sub-view.c
 src/network-sub-view.c
 src/performance-view.c
 src/power-view.c
 src/process-dialog.c
+src/storage-analyzer.c
+src/storage-item.c
 src/storage-view.c
+src/utils.c
 src/window.c