Add previous NEWS* files to dist

Change-Id: I2f814e01c7b5aa9cd76e8e63c9c4a1ebbf3dd2ea
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/1905


Tested-by: jenkins
Reviewed-by: Luca Bruno <lucab@debian.org>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

Makefile.am

@@ -26,6 +26,7 @@ EXTRA_DIST = \
 	NEWTAPS \
 	README.Windows \
 	README.OSX \
+	$(wildcard $(srcdir)/NEWS*) \
 	Doxyfile.in \
 	tools/logger.pl \
 	contrib/loaders