benchtests: Add calloc test

Two new benchmarks related to calloc added:
- bench-calloc-simple
- bench-calloc-thread
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

benchtests/bench-calloc-thread.c

@@ -0,0 +1,22 @@
+/* Benchmark calloc and free functions.
+   Copyright (C) 2024 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/>.  */
+
+#define TEST_FUNC(size) calloc (1, size)
+#define TEST_NAME "calloc"
+
+#include "bench-malloc-thread.c"