Update CLT pkg id for 10.10 and last two for 10.9

Adds the CLT pkg id for 10.10, and also for 10.9's _mavericks_june_2014_  (released June 2nd) and later.

This fixes issues where `MacOS::CLT.installed?` was failing to find that the CLT were installed. This would be where users had uninstalled a previous CLT and updated to latest (what I did), or where the CLT were a first-time install.

Appears to fix #29954 and #22816. I ran into the `python` formula `hashlib` issue using `superenv`, but it worked with `stdenv`, which led me to realize that `MacOS::CLT.installed?` was not resolving for latest CLT package installs on 10.9. Not sure what other current issues it may fix.
I wonder if we just change the names for both of these `PKG_ID`s above if they don't just apply to e.g. Mavericks. Will have a look/think. Great find here though, thanks!