tree 0e512dab2b10d0ab3bf897b5815a59f607ffe9dc
parent 4879b37b5db3b06eb17a4a0deda5fc08fef51c41
author Ethan Yonker <dees_troy@teamw.in> 1553260701 -0500
committer Ethan Yonker <dees_troy@teamw.in> 1553260704 -0500

Support both old and new mkfs.f2fs

Easiest way I could find to determine if we have the old or the
new mkfs.f2fs version is to pipe the usage output to grep and
grep the output for "reserved" and redirect the output to a file.
If the file has any data in it, then we must have the old
mkfs.f2fs that uses -r.

Change-Id: I7f1ed88b577a3f9827a98f0868d8f82e4e4886ac