[MiNT] xaaes: Add missing clean target

[Patrice Mandin <mandin.patrice@orange.fr>]

Hello,

When doing 'make clean' in freemint sources, we got an error because
clean target is missing from xaaes/src.km/gradient/Makefile .
So here is a patch that adds it.

-- 
Patrice Mandin
WWW: http://pmandin.atari.org/
Programmeur Linux, Atari
Spécialité: Développement, jeux

"who writes the code, decides"

Index: Makefile
===================================================================
RCS file: /mint/freemint/xaaes/src.km/gradient/Makefile,v
retrieving revision 1.5
diff -U 65535 -r1.5 Makefile
--- Makefile	27 Aug 2011 12:13:12 -0000	1.5
+++ Makefile	29 Aug 2011 11:47:57 -0000
@@ -1,21 +1,23 @@
 SHELL = /bin/sh
 SUBDIRS =
 
 srcdir = .
 top_srcdir = ..
 subdir = gradients
 
 include $(top_srcdir)/CONFIGVARS
 
 GRADIENTS = g_blue.grd g_cyan.grd g_green.grd g_purple.grd g_red.grd g_yellow.grd default.grd \
 	n_blue.grd n_cyan.grd n_green.grd n_purple.grd n_red.grd n_yellow.grd n_deflt.grd \
 	menubar.grd mint.grd flwrpwr.grd
 
 all: $(GRADIENTS)
 
-distclean:
+distclean:	clean
+
+clean:
 	rm -f $(GRADIENTS)
 
 %.grd: %.c
 	$(CC) -c -o $(@:.c=.grd) $<