[packaging] Remove stray # in install.rake

install.rake has two lines with '#' in them that appears to be left over from a
variable -> hard path change. This commit removes them so the directory strings
are constructed correctly.

Signed-off-by: Moses Mendoza <moses@puppetlabs.com>
Merge pull request #448 from MosesMendoza/maint/master/packaging_fixups

[packaging] Remove stray # in install.rake