Minor string quote error correction in script

[20kaushik02]

In line 1076, the path for test_spa isn't quoted. Either change it to use the xpui_spa_patch variable, or surround the path in double quotes.

Wasn't sure if this was enough for a PR, so here I am.

[amd64fox]

Thanks for being observant, in fact I just forgot to put the $xpui_spa_patch variable there, which is a little higher, it will be fixed with the next update.