ANDROID: sdcardfs: Add support for d_canonical_path

Change-Id: I5d6f0e71b8ca99aec4b0894412f1dfd1cfe12add
Signed-off-by: Daniel Rosenberg <drosen@google.com>
diff --git a/fs/sdcardfs/dentry.c b/fs/sdcardfs/dentry.c
index dbbcfd0..ba165ef 100644
--- a/fs/sdcardfs/dentry.c
+++ b/fs/sdcardfs/dentry.c
@@ -177,5 +177,6 @@
 	.d_release	= sdcardfs_d_release,
 	.d_hash 	= sdcardfs_hash_ci,
 	.d_compare	= sdcardfs_cmp_ci,
+	.d_canonical_path = sdcardfs_get_real_lower,
 };