[autobuild] include first.h in make dist

From: Stefan Bühler <stbuehler@web.de>

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@3114 152afb58-edef-0310-8abb-c4023f1b3aa9

src/Makefile.am

@@ -270,7 +270,7 @@ mod_accesslog_la_LIBADD = $(common_libadd)
 
 hdr = server.h base64.h buffer.h network.h log.h keyvalue.h \
 	response.h request.h fastcgi.h chunk.h \
-	settings.h http_chunk.h \
+	first.h settings.h http_chunk.h \
 	md5.h http_auth.h stream.h \
 	fdevent.h connections.h base.h stat_cache.h \
 	plugin.h mod_auth.h \