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/hw/android_mips.c b/hw/android_mips.c
index d8621ab..d44b725 100644
--- a/hw/android_mips.c
+++ b/hw/android_mips.c
@@ -12,7 +12,7 @@
 #include "hw.h"
 #include "boards.h"
 #include "devices.h"
-#include "net.h"
+#include "net/net.h"
 #include "sysemu.h"
 #include "mips.h"
 #include "goldfish_device.h"