build: Add a --with-profile option
build: Add a --with-profile option

Profiles are high level names like gnome, intelce, windows (or it could
be a specific product) to identify the different builds profiles we
support and be able to give sane defaults and tweak mex accordingly.

media-explorer/media-explorer,media-explorer/media-explorer,media-explorer/media-explorer,media-explorer/media-explorer