clang: add missing ; for llvm targets
clang: add missing ; for llvm targets

Without this, we get a syntax error when we don't override
LLVM_TARGETS_TO_BUILD_TARGET because LLVM_TARGETS_TO_BUILD_TARGET gets
set as something like "X86X86" instead of "X86;X86".

Signed-off-by: Martin Kelly <c87c89f8a4ed3f9815bf6eb199372979d459c1c8@xevo.com>

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