Move net.h to include/net/

+ Move net-android.c and net.c to net/
+ Rename net-checksum.c to net/checksum.c
+ Move sockets.h and shaper.h to include/android/
  and sockets.c + shaper.c to android/

+ Move vgafont.h to ui/

Change-Id: I2659a919a316d3f95aac0f9924833eeee4cb5592
diff --git a/vl.c b/vl.c
index 21c11b5..a7285a7 100644
--- a/vl.c
+++ b/vl.c
@@ -145,7 +145,7 @@
 #include "hw/smbios.h"
 #include "hw/xen.h"
 #include "bt-host.h"
-#include "net.h"
+#include "net/net.h"
 #include "monitor.h"
 #include "ui/console.h"
 #include "sysemu.h"