[3.0] configure: use pkg-config file for sndio
(cherry picked from commit a9406397) Signed-off-by: Rémi Denis-Courmont remi@remlab.net
Conflicts: configure.ac
Edited by Steve Lhomme
(cherry picked from commit a9406397) Signed-off-by: Rémi Denis-Courmont remi@remlab.net
Conflicts: configure.ac
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