File feh-makefile_app.patch of Package feh

Index: feh-3.9/config.mk
===================================================================
--- feh-3.9.orig/config.mk
+++ feh-3.9/config.mk
@@ -19,7 +19,7 @@ ICON_PREFIX ?= ${DESTDIR}${PREFIX}/share
 # generally supported. So ignore PREFIX and always install icons into
 # /usr/share/icons if the user wants to install feh on their local machine.
 ifeq (${app},1)
-	ICON_PREFIX = /usr/share/icons
+	ICON_PREFIX = ${DESTDIR}${PREFIX}/share/icons
 endif
 
 # Directories for manuals, executables, docs, data, etc.