heimdal: Add 64-bit integer support to ASN.1 compiler

[dim]

Summary

Import upstream 19d378f44:

ASN.1 INTEGERs will now compile to C int64_t or uint64_t, depending
on whether the constraint ranges include numbers that cannot be
represented in 32-bit ints and whether they include negative
numbers.

Template backend support included.  check-template is now built with
--template, so we know we're testing it.

Tests included.

This should ensure generated asn1 headers (cms_asn1.h, krb5_asn1.h etc)
are the same for 64-bit and 32-bit hosts. In particular, cross-building
i386 from amd64 should result in exactly the same asn1 headers as a
native i386 build.

Obtained from: upstream 19d378f44
MFC after: TBD

Test Plan

I have no idea how to do a kerberos regression test. There
seem to be none in our tree?

[dim]

Sorry about the "binary" files, but I couldn't convince arc to upload them otherwise. They aren't binary in my tree.

[dim]

Abandon in favor of D44813 which might be easier to review.

[emaste]

Replaced with D44815 and D44814