Include ChangeLog.txt in dist


git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@161 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/Makefile.am b/Makefile.am
index 407ed58..01c9641 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -82,7 +82,8 @@
 
 DOCS= README install.doc usage.doc wizard.doc example.c libjpeg.doc \
 	structure.doc coderules.doc filelist.doc jconfig.doc change.log \
-	README-turbo.txt rdrle.c wrrle.c LICENSE.txt LGPL.txt BUILDING.txt
+	README-turbo.txt rdrle.c wrrle.c LICENSE.txt LGPL.txt BUILDING.txt \
+	ChangeLog.txt
 
 TESTFILES= testorig.jpg testorig.ppm testimg.bmp testimgflt.jpg \
 	testimgfst.jpg testimgint.jpg testimgp.jpg testimgfst.ppm testimgint.ppm