Add and install a xv.desktop file.

This is from xv-20081218-fabian-greffrath-04-install-desktop.patch.
Additional MIME types were added.

Makefile

@@ -62,6 +62,7 @@ MANDIR = $(PREFIX)/share/man/man1
 MANSUF = 1
 DOCDIR = $(PREFIX)/share/doc/xv
 XPMDIR = $(PREFIX)/share/pixmaps
+APPDIR = $(PREFIX)/share/applications
 LIBDIR = $(PREFIX)/lib/xv
 SYSCONFDIR = /etc
 DESTDIR =
@@ -444,7 +445,10 @@ install: all
         $(MKDIR) $(DESTDIR)$(XPMDIR)
         cp contrib/xv.xpm $(DESTDIR)$(XPMDIR)/.
         chmod 644 $(DESTDIR)$(XPMDIR)/xv.xpm
-
+#
+        $(MKDIR) $(DESTDIR)$(APPDIR)
+        cp contrib/xv.desktop $(DESTDIR)$(APPDIR)/.
+        chmod 644 $(DESTDIR)$(APPDIR)/xv.desktop
 #
 	#$(MKDIR) $(DESTDIR)$(SYSCONFDIR)
 	#cp xv_mgcsfx.sample $(DESTDIR)$(SYSCONFDIR)/xv_mgcsfx

contrib/xv.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Type=Application
+Name=XV
+Comment=An interactive image manipulation program
+Icon=xv
+TryExec=xv
+Exec=xv %F
+Categories=Graphics;RasterGraphics;Viewer;
+MimeType=image/gif;image/jpeg;image/tiff;image/postscript;image/x-portable-bitmap;image/x-portable-graymap;image/x-portable-pixmap;image/x-xbitmap;image/x-xpixmap;image/x-ms-bmp;image/cmu-raster;image/x-rgb;image/targa;image/fits;image/png;image/pm;image/webp;image/jp2;image/jpx;image/jpm;image/g3fax