lock when building llvm37 on RPI3

[Otacílio]

Hello guys.

To those who are using ARM64, have you compiled large software like 
llvm? I'm trying to compile llvm37 but, at first try, the system spent 
more than an hour on [42/3588] when compiling llvm37 as a dependency of 
webcamd. Then, I reset and it passed quickly from 42 and is now on 
[148/3588]. I also faced two crashes when I was trying to do this for 
ssh, but unfortunately I had no monitor connected to RPI3. I am using 
head revision 317063.


[]'s

-Otacilio