Add bots with address- and thread-sanitizer

[ebraminio]

Fixes #1168

[ebraminio]

https://circleci.com/gh/harfbuzz/harfbuzz/33002 over to you guys I guess @behdad @garretrieger @rsheeter

[ebraminio]

Fixed some of them, including subset related one so nothing in particular about hb-subset for now. Lets see how to fix the rest.

[behdad]

For thread-sanitizer to have any use, we need to add multi-threaded test, and then just run that one with thread-sanitizer.

Also useful is undefined-behavior sanitizer, and memory sanitizer. Unfortunately doesn't seem like they can be combined...

[behdad]

But yeah, I think one bot is fine.

[behdad]

I'm merging and fixing the rest. Thanks.

[ebraminio]

But yeah, I think one bot is fine.

Will do after we have all the bots green.

[behdad]

But yeah, I think one bot is fine.

Will do after we have all the bots green.

Since you set it up already, let's leave as is and see how long it takes them... I don't know how much setting up the bot takes in comparison to just running our stuff...

Also, @garretrieger will buy us an additional container...