test: another 'add recursive' test

[daviddias]

Found today that jsipfs files add -r <folder> doesn't always succeed, taking as example folders within js-ipfs repo:

• ✔︎ jsipfs files add -r src/init-files/init-docs
• ✔︎ jsipfs files add -r src/init-files
• ✔︎ jsipfs files add -r src
• 𝙓 jsipfs files add -r test

» jsipfs files add -r test

assert.js:85
  throw new assert.AssertionError({
  ^
AssertionError: need one root
    at reduceToParents (/Users/ground-control/code/js-ipfs/node_modules/ipfs-unixfs-engine/src/builder/balanced/balanced-reducer.js:20:12)                                                                      at reduced (/Users/ground-control/code/js-ipfs/node_modules/ipfs-unixfs-engine/src/builder/balanced/balanced-reducer.js:44:9)
    at /Users/ground-control/code/js-ipfs/node_modules/pull-stream/sinks/reduce.js:10:5
    at /Users/ground-control/code/js-ipfs/node_modules/pull-stream/sinks/drain.js:20:24
    at /Users/ground-control/code/js-ipfs/node_modules/pull-stream/throughs/async-map.js:24:19
    at pull (/Users/ground-control/code/js-ipfs/node_modules/pull-through/index.js:46:22)
    at next (/Users/ground-control/code/js-ipfs/node_modules/pull-through/node_modules/looper/index.js:7:11)
    at /Users/ground-control/code/js-ipfs/node_modules/pull-through/node_modules/looper/index.js:9:18
    at /Users/ground-control/code/js-ipfs/node_modules/pull-through/index.js:62:13
    at pull (/Users/ground-control/code/js-ipfs/node_modules/pull-through/index.js:46:22)

@pgte could you check this?

[pgte]

Should be fixed by ipfs-inactive/js-ipfs-unixfs-engine#131

[daviddias]

we need to stop using language like 'should fix' in PR, github is closing PR across repos instead of just closing issues :(