Convert test-launcher into a generic asan-launcher so that it can be used to run kitty as well

asan-launcher.c

@@ -0,0 +1,17 @@
+/*
+ * linux-launcher.c
+ * Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
+ *
+ * Distributed under terms of the GPL3 license.
+ */
+
+#include <Python.h>
+
+#define MAX_ARGC 1024
+
+int main(int argc, char *argv[]) {
+    wchar_t *argvw[MAX_ARGC + 1] = {0};
+    argvw[0] = L"kitty";
+    for (int i = 1; i < argc; i++) argvw[i] = Py_DecodeLocale(argv[i], NULL);
+    return Py_Main(argc, argvw);
+}