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/slirp-android/socket.c b/slirp-android/socket.c
index 439590a..0b46f7b 100644
--- a/slirp-android/socket.c
+++ b/slirp-android/socket.c
@@ -14,7 +14,7 @@
 #include <sys/filio.h>
 #endif
 #define  SLIRP_COMPILATION 1
-#include "sockets.h"
+#include "android/sockets.h"
 #include "proxy_common.h"
 
 static void sofcantrcvmore(struct socket *so);