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/oslib-posix.c b/util/oslib-posix.c
index 433dd68..4e4b819 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -134,14 +134,14 @@
     free(ptr);
 }
 
-void socket_set_block(int fd)
+void qemu_set_block(int fd)
 {
     int f;
     f = fcntl(fd, F_GETFL);
     fcntl(fd, F_SETFL, f & ~O_NONBLOCK);
 }
 
-void socket_set_nonblock(int fd)
+void qemu_set_nonblock(int fd)
 {
     int f;
     f = fcntl(fd, F_GETFL);