Handle stale bin/ dirs in repos

[roehrich-hpe]

The bin/ dir in each repo is created and populated by the Makefile to contain the tools specified in the makefile. When we bump the version of one of those tools, we need a way for the Makefile to notice that an existing bin/ dir has an older version of the tool, and to update that tool.

[roehrich-hpe]

Until we can do it automatically, the way to handle stale bin dirs is to do the following in each repo:

chmod -R u+w bin
rm -rf bin