utils/alsa.m4: another quick fix for the brackets
utils/alsa.m4: another quick fix for the brackets

BugLink: https://github.com/alsa-project/alsa-lib/pull/133
From: asavah <2ad2b54835d610958901218a70cf9377f92c0ee1@avh.od.ua>
Signed-off-by: Jaroslav Kysela <72edd5e1a572f82f059ccbb83c92b74d6cb051ff@perex.cz>

alsa-project/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib