oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock()

The fcntl(fd, F_SETFL, O_NONBLOCK) flag is not specific to sockets.
Rename to qemu_set_nonblock() just like qemu_set_cloexec().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index b6b78f5..b632a74 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -277,7 +277,7 @@
     }
     qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
     if (connect_state != NULL) {
-        socket_set_nonblock(sock);
+        qemu_set_nonblock(sock);
     }
     /* connect to peer */
     do {
@@ -737,7 +737,7 @@
         connect_state = g_malloc0(sizeof(*connect_state));
         connect_state->callback = callback;
         connect_state->opaque = opaque;
-        socket_set_nonblock(sock);
+        qemu_set_nonblock(sock);
     }
 
     memset(&un, 0, sizeof(un));