[COOK-4512] Bugfix: Use empty PATH if PATH is nil

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 2.3.10
Publish 2.3.10 Changelog
Version bump to 2.3.11 (for development)
[COOK-4534]: Add option to update apt cache at compiletime

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 2.4.0
Publish 2.4.0 Changelog
bumping for devodd