message string changes, mostly for consistency, also -32 bytes in .rodata
diff --git a/archival/libunarchive/unpack_ar_archive.c b/archival/libunarchive/unpack_ar_archive.c
index eed5283..6a84ae8 100644
--- a/archival/libunarchive/unpack_ar_archive.c
+++ b/archival/libunarchive/unpack_ar_archive.c
@@ -14,7 +14,7 @@
 
 	xread(ar_archive->src_fd, magic, 7);
 	if (strncmp(magic, "!<arch>", 7) != 0) {
-		bb_error_msg_and_die("Invalid ar magic");
+		bb_error_msg_and_die("invalid ar magic");
 	}
 	ar_archive->offset += 7;