test: check the namespace is not cluttered with min/max

libnvme defined a min/max macro before and exposed to all users.
This has been removed but let's sure it doesn't come back, thus
add a test for this.

Before renaming the macro, the cpp's std::min will fail to compile.
```
./test/cpp.cc: In function ‘int min_compile_test()’:
../src/nvme/util.h:563:19: error: expected unqualified-id before ‘(’ token
  563 | #define min(x, y) ((x) > (y) ? (y) : (x))
```
Signed-off-by: Jian Zhang <zhangjian.3032@bytedance.com>
[wagi: move the test to a seperate file]
Signed-off-by: Daniel Wagner <wagi@kernel.org>

Author: zhangjian3032

test/meson.build

@@ -23,6 +23,17 @@ if cxx_available
         dependencies: libnvme_dep,
         include_directories: [incdir, internal_incdir]
     )
+
+    test('cpp-dump', cpp)
+
+    misc = executable(
+        'test-misc',
+        ['misc.cc'],
+        dependencies: libnvme_dep,
+        include_directories: [incdir, internal_incdir]
+    )
+    test('cpp-misc', misc)
+
 endif
 
 register = executable(

test/misc.cc

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/**
+ * This file is part of libnvme.
+ * Copyright (c) 2025 Daniel Wagner, SUSE LLC
+ */
+
+#include <algorithm>
+#include <libnvme.h>
+
+static int minmax_test()
+{
+	/*
+	 * Ensure libnvme doesn't spoil the namespace, e.g. by exposing a
+	 * min/max macro.
+	 */
+	return !(std::min(1, 2) == 1 && std::max(1, 2) == 2);
+}
+
+int main(int argc, char *argv[])
+{
+	return minmax_test();
+}