fix the repo verify test

We've added a new file to the flatfs datastore.

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

test/sharness/t0086-repo-verify.sh

@@ -24,7 +24,7 @@ sort_rand() {
 }
 
 check_random_corruption() {
-  to_break=$(find "$IPFS_PATH/blocks" -type f | grep -v README | grep -v SHARDING | sort_rand | head -n 1)
+  to_break=$(find "$IPFS_PATH/blocks" -type f -name '*.data' | sort_rand | head -n 1)
 
   test_expect_success "back up file and overwrite it" '
     cp "$to_break" backup_file &&