Fix wrong XDG patch for kshutdown, which resulted in missing icons.

This reverts commit 17237bcf62.

Signed-off-by: Chris <xchrisx@uber.space>
(cherry picked from commit f416bfb327)

extras/shutdown/.directory

@@ -1,7 +1,7 @@
 [Desktop Entry]
 # Encoding: UTF-8
 Type=Directory
-Icon=computer-log-out
+Icon=system-log-out
 Comment=Shut Down
 Comment[pl]=Zamykanie Systemu
 Comment[el]=Τερματισμός

extras/shutdown/cancelshutdown.desktop

@@ -8,7 +8,7 @@ Comment[el]=Ακύρωση τερματισμού
 Exec=/sbin/shutdown -c
 GenericName=
 GenericName[pl]=
-Icon=computer-log-out
+Icon=system-log-out
 MimeType=
 Path=
 StartupNotify=true

extras/shutdown/fsck.desktop

@@ -8,7 +8,7 @@ Comment[el]=Επανεκκίνηση και εκτέλεση του `fsck'
 Exec=/sbin/shutdown -r -F 1
 GenericName=
 GenericName[pl]=
-Icon=computer-log-out
+Icon=system-log-out
 MimeType=
 Path=
 StartupNotify=true