[gtk+] Drop remaining traces of GTK_UPDATE_ICON_CACHE build variable

[Rui Matos <rtcm src gnome org>]

commit e629aba1a2086506af4b17c24efa0d9ab7208f52
Author: Rui Matos <tiagomatos gmail com>
Date:   Mon Dec 1 18:24:27 2014 +0100

    Drop remaining traces of GTK_UPDATE_ICON_CACHE build variable
    
    Commit 655c75cab791ea965e705e1b8518e6008d3a755f removed the need for
    this variable but left a couple of uses in. Drop them.

 demos/gtk-demo/Makefile.am       |    2 +-
 demos/widget-factory/Makefile.am |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/Makefile.am b/demos/gtk-demo/Makefile.am
index 6bb7d2a..145c98a 100644
--- a/demos/gtk-demo/Makefile.am
+++ b/demos/gtk-demo/Makefile.am
@@ -171,7 +171,7 @@ dist_appsicon32_DATA = data/32x32/gtk3-demo.png data/32x32/gtk3-demo-symbolic.sy
 dist_appsicon48_DATA = data/48x48/gtk3-demo.png data/48x48/gtk3-demo-symbolic.symbolic.png
 dist_appsicon256_DATA = data/256x256/gtk3-demo.png data/256x256/gtk3-demo-symbolic.symbolic.png
 
-update_icon_cache = $(GTK_UPDATE_ICON_CACHE) --ignore-theme-index --force
+update_icon_cache = gtk-update-icon-cache --ignore-theme-index --force
 
 install-data-hook: install-update-icon-cache
 uninstall-hook: uninstall-update-icon-cache
diff --git a/demos/widget-factory/Makefile.am b/demos/widget-factory/Makefile.am
index fb6ca62..2436798 100644
--- a/demos/widget-factory/Makefile.am
+++ b/demos/widget-factory/Makefile.am
@@ -47,7 +47,7 @@ dist_appsicon32_DATA = data/32x32/gtk3-widget-factory.png data/32x32/gtk3-widget
 dist_appsicon48_DATA = data/48x48/gtk3-widget-factory.png 
data/48x48/gtk3-widget-factory-symbolic.symbolic.png
 dist_appsicon256_DATA = data/256x256/gtk3-widget-factory.png 
data/256x256/gtk3-widget-factory-symbolic.symbolic.png
 
-update_icon_cache = $(GTK_UPDATE_ICON_CACHE) --ignore-theme-index --force
+update_icon_cache = gtk-update-icon-cache --ignore-theme-index --force
 
 install-data-hook: install-update-icon-cache
 uninstall-hook: uninstall-update-icon-cache