* Introduce Model Library Format export format.
* This function produces a stable on-disk representation of TVM's
compiler output.
* It's intended just for use with the C runtime for microTVM right
now. It could be expanded for other use cases.
* This PR implements the Model Library Format RFC, which ultimately
is intended to support the Project Generator API (RFC
forthcoming).
* There may be some changes to the format without revving the version
number until downstream consumers are known. The Project Generator
API is the first such known downstream consumer.
* There are no plans currently to support generating old Model
Library Format from TVM. The version number is intended as a
compatibility check between the generator and downstream consumers.
Andrew Reusch
ee052dd642