dawn: fix network packet format to be host-agnostic

I tried Dawn and it whined at me because it didn't understand its
own packets from a different-endian host.

Mon Jun  8 10:49:12 2020 daemon.err dawn[19742]: not complete msg, len:308, expected len:872480768
Mon Jun  8 10:49:12 2020 daemon.err dawn[19742]: not complete msg, len:708, expected len:3288465408

https://github.com/berlin-open-wireless-lab/DAWN/issues/92

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

net/dawn/Makefile

@@ -5,13 +5,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dawn
-PKG_SOURCE_DATE:=2020-06-06
+PKG_SOURCE_DATE:=2020-06-08
 PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/berlin-open-wireless-lab/DAWN.git
-PKG_SOURCE_VERSION:=534f7866160bcd7d398827e540a564c2636d4a71
-PKG_MIRROR_HASH:=1c7194f9b595c101394b8d411e536d540d813452c1a11314afad6da0310a1668
+PKG_SOURCE_VERSION:=050c1d7fed624161d29b09f1b46708d342496012
+PKG_MIRROR_HASH:=e831b2cf9db8827498a0d460004a9e1a512cd015f216c418008d0d29f1d2e145
 
 PKG_MAINTAINER:=Nick Hainke <vincent@systemli.org>
 PKG_LICENSE:=GPL-2.0-only