2014-01-22: make clean removes ChangeLog.

make clean removes ChangeLog.

diff --git a/Makefile.am b/Makefile.am
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,7 +1,7 @@
 wisp = wisp.scm language/wisp/spec.scm
 wisp_SOURCES = wisp-guile.w wisp-reader.w
 EXTRA_DIST = $(wisp_SOURCES) $(wisp_DATA) bootstrap.sh wisp.py examples tests runtests.sh
-CLEANFILES = ${wisp} 
+CLEANFILES = ${wisp} ChangeLog
 DISTCLEANFILES = ${CLEANFILES} @abs_top_builddir@/1 @abs_top_builddir@/2 @abs_top_builddir@/test.sh
 
 all : ${wisp}