Include hostapd source code in wpa_supplicant release package

This is needed to be able to build with CONFIG_AP=y.

build_release

@@ -38,7 +38,7 @@ git archive --format=tar --prefix=hostapd-$VER/ HEAD \
 	README COPYING patches src hostapd |
 	gzip > $RELDIR/hostapd-$VER.tar.gz
 git archive --format=tar --prefix=wpa_supplicant-$VER/ HEAD \
-	README COPYING patches src wpa_supplicant |
+	README COPYING patches src wpa_supplicant hostapd/*.[ch] |
 	tar --directory=$TMP -xf -
 
 cd $TMP