Sadly, no. You won't get that until if/when official ships (except for the kernel). For now, you should still use 17.1 for such purposes.What did you change to the device/kernel/vendor to get it compiling? Is there a patch or new code trees i can tinker with?
Also so far on my tiny old puter that i had dedicated for that it seems want to start with just 8gb of ram using -j1 on make and setting a 32gb swap file and setting the java heap to 6GB.
Regarding ram I was doing the same tbh. Then I finally saved up for another 8GB ram stick and it pays out, especially if you're doing this demanding android stuff. So I did it and...all the things once again function normally, the pc doesn't completely freeze up on some parts while compiling etc. It's still possible on 18.1 to get the build to finish on 8gb if you set the java heap yes, not even -j1 is needed on all parts because that would take way too long.