[gnome-clocks] snap: Fixed snapcraft deprecations

[Ken VanDine <kvandine src gnome org>]

commit 4060e0222944406dc2e42433021e2b543438131e
Author: Ken VanDine <ken vandine org>
Date:   Fri Aug 3 14:15:54 2018 -0400

    snap: Fixed snapcraft deprecations

 snap/snapcraft.yaml | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)
---
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index 67ef239..d44449c 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -12,7 +12,19 @@ plugs:
   gnome-3-26-1604:
     interface: content
     target: $SNAP/gnome-platform
-    default-provider: gnome-3-26-1604:gnome-3-26-1604
+    default-provider: gnome-3-26-1604
+  gtk-3-themes:
+    interface: content
+    target: $SNAP/data-dir/themes
+    default-provider: gtk-common-themes
+  icon-themes:
+    interface: content
+    target: $SNAP/data-dir/icons
+    default-provider: gtk-common-themes
+  sound-themes:
+    interface: content
+    target: $SNAP/data-dir/sounds
+    default-provider: gtk-common-themes
 
 slots:
   # for GtkApplication registration
@@ -75,9 +87,9 @@ parts:
     meson-parameters: [--prefix=/snap/gnome-clocks/current/usr]
     organize:
       snap/gnome-clocks/current/usr: usr
-    prepare:
+    override-build: |
       sed -i.bak -e 's|=org.gnome.clocks$|=${SNAP}/meta/gui/org.gnome.clocks.png|g' 
data/org.gnome.clocks.desktop.in
-    install: |
+      snapcraftctl build
       mkdir -p $SNAPCRAFT_PART_INSTALL/meta/gui/
       cp ../src/data/icons/hicolor/256x256/apps/org.gnome.clocks.png $SNAPCRAFT_PART_INSTALL/meta/gui/
       cp snapbuild/data/org.gnome.clocks.desktop $SNAPCRAFT_PART_INSTALL/meta/gui/