packaging: add default location for debian repository builds

- also includes default configuration for reprepro repository
  build tool.
packaging: regularize where packages get built
mspdebug: kick to version 0.22
mspdebug: add repo section to packaging
tinyos (src): add repo section for packaging
tinyos (src): rename version to 2.1.2d (for 2.1.2 development)

Its not 2.1.3 yet.