clang: Define LLVM_HOST_TRIPLE
clang: Define LLVM_HOST_TRIPLE

This helps ensure that lldb-server gets correct tripets on target

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

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