Set i386 default target CPU to be i686 (same as gcc)
(Closes: #812803)
* d/p/clang-fix-cmpxchg8-detection-on-i386.patch:
libcxx atomic tests for old i386 fail with wrong Atomic inline width.
Needed for libc++
(See https://llvm.org/bugs/show_bug.cgi?id=19355)
* d/p lldb-addversion-suffix-to-llvm-server-exec.patch:
Fix the lldb-server call in some cases
