util/oslib-posix: Fix superfluous trailing semicolon

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

util/oslib-posix.c

@@ -263,7 +263,7 @@ int qemu_socketpair(int domain, int type, int protocol, int sv[2])
         return ret;
     }
 #endif
-    ret = socketpair(domain, type, protocol, sv);;
+    ret = socketpair(domain, type, protocol, sv);
     if (ret == 0) {
         qemu_set_cloexec(sv[0]);
         qemu_set_cloexec(sv[1]);