[gnome-disk-utility] Fix distcheck

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 6679df03a923165a8d2edf1842dddc6bc26368ef
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Mar 22 13:43:49 2015 -0500

    Fix distcheck

 data/icons/HighContrast/Makefile.am |    2 +-
 data/icons/hicolor/Makefile.am      |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/icons/HighContrast/Makefile.am b/data/icons/HighContrast/Makefile.am
index 86f8604..2fd12ed 100644
--- a/data/icons/HighContrast/Makefile.am
+++ b/data/icons/HighContrast/Makefile.am
@@ -4,7 +4,7 @@ SUBDIRS = 16x16 22x22 24x24 32x32 48x48 256x256
 gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/HighContrast
 
 install-data-hook:
-       @-if test -z "$(DESTDIR)"; then \
+       @-if test -z "$(DESTDIR)"/icons/HighContrast; then \
                echo "Updating Gtk icon cache."; \
                $(gtk_update_icon_cache); \
        else \
diff --git a/data/icons/hicolor/Makefile.am b/data/icons/hicolor/Makefile.am
index 361deab..1e0a85d 100644
--- a/data/icons/hicolor/Makefile.am
+++ b/data/icons/hicolor/Makefile.am
@@ -4,7 +4,7 @@ SUBDIRS = 16x16 22x22 24x24 32x32 48x48 256x256 scalable
 gtk_update_icon_cache = gtk-update-icon-cache -f -t $(datadir)/icons/hicolor
 
 install-data-hook:
-       @-if test -z "$(DESTDIR)"; then \
+       @-if test -z "$(DESTDIR)"/icons/hicolor; then \
                echo "Updating Gtk icon cache."; \
                $(gtk_update_icon_cache); \
        else \