util-linux: support erofs filesystem

Add erofs to the known volume_ids.

function                                             old     new   delta
volume_id_probe_erofs                                  -      89     +89
fs1                                                   24      28      +4
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(add/remove: 2/0 grow/shrink: 1/0 up/down: 93/0)               Total: 93 bytes

Signed-off-by: Norbert Lange <nolange79@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/volume_id/volume_id_internal.h b/util-linux/volume_id/volume_id_internal.h
index ada1833..609beb8 100644
--- a/util-linux/volume_id/volume_id_internal.h
+++ b/util-linux/volume_id/volume_id_internal.h
@@ -215,6 +215,8 @@
 
 int FAST_FUNC volume_id_probe_squashfs(struct volume_id *id /*,uint64_t off*/);
 
+int FAST_FUNC volume_id_probe_erofs(struct volume_id *id /*,uint64_t off*/);
+
 int FAST_FUNC volume_id_probe_sysv(struct volume_id *id /*,uint64_t off*/);
 
 int FAST_FUNC volume_id_probe_udf(struct volume_id *id /*,uint64_t off*/);