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/udp.c b/slirp-android/udp.c
index 1de938a..15fed77 100644
--- a/slirp-android/udp.c
+++ b/slirp-android/udp.c
@@ -41,7 +41,7 @@
 #include <slirp.h>
 #include "ip_icmp.h"
 #define SLIRP_COMPILATION  1
-#include "sockets.h"
+#include "android/sockets.h"
 
 #ifdef LOG_ENABLED
 struct udpstat udpstat;