osdep: replace setsockopt by qemu_setsockopt

Fix the compiler warning when cross build qemu-ga
for windows by using qemu_setsockopt() instead of
setsockopt().

util/osdep.c: In function 'socket_set_nodelay':
util/osdep.c:69:5: warning: passing argument 4 of 'setsockopt' from
                   incompatible pointer type [enabled by default]
In file included from /home/lei/qemu_b/include/sysemu/os-win32.h:30:0,
                 from /home/lei/qemu_b/include/qemu-common.h:46,
                 from util/osdep.c:48:
/usr/i686-w64-mingw32/sys-root/mingw/include/winsock2.h:990:63: note:
                 expected 'const char *' but argument is of type 'int *'
Signed-off-by: NLei Li <lilei@linux.vnet.ibm.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

util/osdep.c

@@ -57,7 +57,7 @@ static const char *qemu_version = QEMU_VERSION;
 int socket_set_cork(int fd, int v)
 {
 #if defined(SOL_TCP) && defined(TCP_CORK)
-    return setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v));
+    return qemu_setsockopt(fd, SOL_TCP, TCP_CORK, &v, sizeof(v));
 #else
     return 0;
 #endif
@@ -66,7 +66,7 @@ int socket_set_cork(int fd, int v)
 int socket_set_nodelay(int fd)
 {
     int v = 1;
-    return setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
+    return qemu_setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, sizeof(v));
 }
 
 int qemu_madvise(void *addr, size_t len, int advice)