fix flaky links to llvm git, and gettingstarted.rts
- when I tested, llvm.org/git doesnt seem to exist/work?
- => replcaed with
github.com/llvm-mirror
- => replcaed with
- GettingStarted.html doesnt seem to exist?
- seems to be
docs/GettingsStarted.rst?
- seems to be
- made GettingStarted.rst into a link, so can simply click on it
The whole llvm.org domain was being moved to a new server yesterday (http://lists.llvm.org/pipermail/llvm-dev/2017-June/114441.html), and that URL now works again. However you will get a warning that it is redirecting to https://git.llvm.org/git/llvm.git/ when cloning, so the README could use that address instead.
Not working for me... could be some dns issue though?

Can you clone that address? (It might take a bit of time before you get a reply from the remote.)
ah, apparently if I am more pateitn it does reply

(updated the link)