Remove usage of golang*.gdt for bootstrap type info. Instead all types
are reconstituted from the info in the .json files.
Json data now omits more values that are empty.
Json data now has more consistent fully specified type names.
Remove option to create bootstrap gdt files.
Normalize 'Go' name usage where possible without changing previous
saved properties.
Handle swissmap typename changes.
Apply golang runtime function signatures from info stored in json api
snapshot files.
The api snapshot files are created by a custom go helper program that
uses the go compiler parser to parse the go toolchain source tree and
writes the discovered function and type info into a json file.
The go-api-parser helper program is based off of work contributed by
github user monoidic via issue #6367.
Updates generic functions to take a generic dictionary RTTI
parameter (mostly to allow correct assignment of other parameters).
Updates closure functions to take a closure context parameter. Closure
contexts are passed via a register that is not involved in normal
parameter passing.
Tweaks the signature of gcWriteBarrier functions so that they don't mess
up decompilation of functions that use them.