patch alsa config to also look into bundled config dir

[Samueru-sama]

Setting ALSA_CONFIG_PATH only changes the path to the config file, but the file is still hardcoded to look into /etc/alsa and a few other locations.

@hooks [
	{
		func load
		files [
			"/var/lib/alsa/conf.d"
			"/usr/etc/alsa/conf.d"
			"/etc/alsa/conf.d"
			"/etc/asound.conf|||/usr/etc/asound.conf"
			"~/.asoundrc"
			{
				@func concat
				strings [
					{
						@func getenv
						vars [
							XDG_CONFIG_HOME
						]
						default "~/.config"
					}
					"/alsa/asoundrc"
				]
			}
		]
		errors false
	}
]

So when none of those files are present, alsa crashes lol

This patch makes alsa look into the bundled $SHARUN_DIR/share/alsa/alsa.conf.d to avoid such crashes.