Set default __TIMESIZE default to 64

This is expected size for newer ABIs.

sysdeps/unix/sysv/linux/mips/bits/timesize.h

@@ -0,0 +1,24 @@
+/* Bit size of the time_t type at glibc build time, Linux/MIPS.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* Size in bits of the 'time_t' type of the default ABI.  */
+#if _MIPS_SIM == _ABI64
+# define __TIMESIZE	64
+#else
+# define __TIMESIZE	32
+#endif