Use a special test launcher that links the sanitize runtime library directly

test-launcher.c

@@ -0,0 +1,13 @@
+/*
+ * linux-launcher.c
+ * Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
+ *
+ * Distributed under terms of the GPL3 license.
+ */
+
+#include <Python.h>
+
+int main(int argc, char *argv[]) {
+    wchar_t *wargv[2] = {L"kitty-test", L"test.py"};
+    return Py_Main(2, wargv);
+}