Skeleton status files are installed read-only.  When copying to the config dir
upon initialization, make sure they end up writable.

--- byobu-5.127/usr/bin/byobu-janitor.in
+++ byobu-5.127/usr/bin/byobu-janitor.in
@@ -82,6 +82,7 @@
 	if [ ! -r "$BYOBU_CONFIG_DIR/$f" ]; then
 		# Copy from skeleton, if possible
 		cp -f "$BYOBU_PREFIX/share/$PKG/status/$f" "$BYOBU_CONFIG_DIR/$f"
+		chmod +w "$BYOBU_CONFIG_DIR/$f"
 	fi
 done
 
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<tr><td><span title='2022-09-07 14:24:53 +0200'>2022-09-07</span></td><td><a href='/guix/commit/gnu/system/images/pinebook-pro.scm?id=e917f1242c169f011dedd133515de5e87e267b93'>system: images: Define the platform in image-types.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>