remove #.include <src.opts.mk> lines

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Clang Makefile fixes

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Hookup Clang/LLVM into build system (WIP)

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>