tools/qemu: fix FreeBSD compile issue

SVN-Revision: 24888

tools/qemu/patches/010-freebsd-fix.patch

@@ -0,0 +1,11 @@
+--- a/block/sheepdog.c
++++ b/block/sheepdog.c
+@@ -12,7 +12,7 @@
+ #include <windows.h>
+ #include <winsock2.h>
+ #include <ws2tcpip.h>
+-#else
++#elifndef __FreeBSD__
+ #include <netdb.h>
+ #include <netinet/tcp.h>
+