gh-111495: add stub files for C API test modules (GH-111586)

This is to reduce merge conflicts (Modules/Setup.stdlib.in) for
subsequent pull requests for the issue.

1 files changed, 16 insertions, 0 deletions

diff --git a/Modules/_testcapi/numbers.c b/Modules/_testcapi/numbers.c
new file mode 100644
index 0000000..6f7fa3f
--- /dev/null
+++ b/Modules/_testcapi/numbers.c
@@ -0,0 +1,16 @@
+#include "parts.h"
+#include "util.h"
+
+static PyMethodDef test_methods[] = {
+    {NULL},
+};
+
+int
+_PyTestCapi_Init_Numbers(PyObject *mod)
+{
+    if (PyModule_AddFunctions(mod, test_methods) < 0) {
+        return -1;
+    }
+
+    return 0;
+}