tree 9e6f798a0fbc7860a70b9ce6920eabf596ec9c48
parent da7671fcd5593431c9a31c9e005565217b44fe10
author Shawn Pearce <spearce@spearce.org> 1500431407 -0700
committer Shawn Pearce <spearce@spearce.org> 1500469303 -0400

dfs: only create DfsPackFile if description has PACK

In the future with reftable a DFS implementation may choose to create
a PackDescription that contains only a REFTABLE extension.  Filter
these out by only creating a DfsPackFile if the PackDescription as the
expected PackExt.PACK.

Change-Id: I4c831622378156ae6b68f82c1ee1db5e150893be