Bug#877359: still not reproducible

[Rebecca N. Palmer]

On 10/11/2018 14:53, Rebecca N. Palmer wrote:
> I had been mostly ignoring those because there was no point fixing them 
> if this bug was to be left open, but can try to deal with them today.

salsa beignet now has a fix for the INPUT_FILES_BLOCK issue (and uses 
LLVM 7), so applying this patch to llvm should make it reproducible (in 
a constant build path only).