profiles/features/dist-kernel: Fix UNINSTALL_IGNORE value

Fixes: 56e84ac (profiles/default: Apply more important systemd target before features, 2024-01-26)
Signed-off-by: Yuan Liao <liaoyuan@gmail.com>

profiles/features/dist-kernel/make.defaults

@@ -1,7 +1,10 @@
 # Enable USE flag for Distribution Kernel
 USE="dist-kernel"
 
-# Remove "/boot/dtbs/*" and "/lib/modules/*" from UNINSTALL_IGNORE
+# Remove "/boot/dtbs/*" and "{,/usr}/lib/modules/*" from UNINSTALL_IGNORE
 # to permit automatic clean-up of device tree blobs and kernel modules
 # Note: This is necessary for automatic clean-up even on a merged-usr system
 UNINSTALL_IGNORE="/var/run /var/lock"
+# 23.0 profiles are imminent and use merged-usr by default,
+# so just add merged-usr symbolic links unconditionally for now
+UNINSTALL_IGNORE="${UNINSTALL_IGNORE} /bin /lib /lib32 /lib64 /libx32 /sbin /usr/sbin"