package/bluez-alsa: fix location of alsa config files

Since alsa-lib version 1.1.7 [1] the location for add-on config files
has changed.

In fact, the path for the alsa add-on config files has never been
correct set in the package (it should have been
`/usr/share/alsa/alsa.conf.d`).

With alsa-lib version 1.1.7 or later the correct path is
`/etc/alsa/conf.d`.

[1] https://github.com/alsa-project/alsa-lib/commit/93e03bdc2a3dcd5d12516f5de78e14d88a32ff2c

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 4e36111dbcefee516325728375190a33fc63a7b7)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bluez-alsa/bluez-alsa.mk

@@ -23,7 +23,7 @@ BLUEZ_ALSA_CONF_OPTS = \
 	--enable-aplay \
 	--disable-debug-time \
 	--with-alsaplugindir=/usr/lib/alsa-lib \
-	--with-alsaconfdir=/usr/share/alsa
+	--with-alsaconfdir=/etc/alsa/conf.d
 
 ifeq ($(BR2_PACKAGE_FDK_AAC),y)
 BLUEZ_ALSA_DEPENDENCIES += fdk-aac