[Buildroot] [git commit branch/2021.05.x] package/alsa-utils: Fix alsa-plugins compatibility

commit: https://git.buildroot.net/buildroot/commit/?id=4735f45795c4e14f7c51a145b62f63785c6173ff
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2021.05.x

Previously, alsa-plugins would not work if alsa-utils was installed
after it. This happened because:

1. alsa-plugins copies some files $(TARGET_DIR)/usr/share/alsa/alsa.conf.d
2. alsa-utils removes these files during installation ( rm -rf $(TARGET_DIR)/usr/share/alsa/;)

The `rm -rf` command was originally added as part of the fix for
https://bugs.buildroot.org/show_bug.cgi?id=1573 11 years ago.

The intention might have been to allow for unconfiguring some options
and then rebuilding alsa-utils. However, this is a scenario that does
not work anyway.

The simplest fix for the `alsa-plugins` compatibility issue appears to
be to remove the `rm -rf` command.

Signed-off-by: Gleb Mazovetskiy <redacted>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <redacted>
(cherry picked from commit 3454bc99242a1a0069ccdb61d9598dc2fe6a9aa5)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 package/alsa-utils/alsa-utils.mk | 1 -
 1 file changed, 1 deletion(-)

diff --git a/package/alsa-utils/alsa-utils.mk b/package/alsa-utils/alsa-utils.mk
index 2658c827a0..427280c1e6 100644
--- a/package/alsa-utils/alsa-utils.mk
+++ b/package/alsa-utils/alsa-utils.mk

@@ -77,7 +77,6 @@ define ALSA_UTILS_INSTALL_TARGET_CMDS
 	fi
 	if [ -x "$(TARGET_DIR)/usr/sbin/alsactl" ]; then \
 		mkdir -p $(TARGET_DIR)/usr/share/; \
-		rm -rf $(TARGET_DIR)/usr/share/alsa/; \
 		cp -rdpf $(STAGING_DIR)/usr/share/alsa/ $(TARGET_DIR)/usr/share/alsa/; \
 	fi
 endef

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