clang: Use lld for LTO link
clang: Use lld for LTO link

Core uses a dumb utility called dwarfsrcfiles to grok source file names
and it assumes that .o and .a files are good old ELF files, that is not
true when using LTO in which case it becomes IR code, this tool starts
to puke, therefore disable using this tool

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang