I removed strip commands from makefile in llvm and xorg folders and build finished succesfully. However, it does not boot. I get "kernel panic. filesystem not mounting".
Although I do not know why I have not experienced this problem, I believe I have a fix. It appears that the llvm build system only strips at install when not being build with debug symbols. Since the MiniMyth build system handles stripping when assembling the image, there is no need for llvm or any other package to strip the symbols. Hopefully, commit 8360 fixes the problem.
MiniMyth running on an Acer ApireRevo 3610 and a Zotac ZBOX-ID80-U. Find out more at my MythTV page.