Add profile and extension validation printer

Parse tosa.xml and generate the required compliance metadata in the
pre-defined format for profile and extension validation in MLIR

Command line for generation:
  $tools/genspec.py --xml tosa.xml --outdir out/gen --profile

Signed-off-by: TatWai Chong <tatwai.chong@arm.com>
Change-Id: Ib4388b111c32f23ac83a2bde50e4bdbc15dd17cc