package/alsa-utils: fix install if directories exist
"mkdir" (without "-p") fails if the target directory exists, which means
that if alsa-utils is being reinstalled or if other files have
previously been installed in the alsa-state.d or alsa-restore.d
directories the installation will fail.
Switch to "$(INSTALL) -d" which allows us to be explicit about the
permissions and handles the case of a pre-existing directory correctly.
Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>