go.core: Rename package verror2 to verror.

Also a few other renames, while we're at it:
  verror.Make -> verror.New
  verror.ExplicitMake -> verror.ExplicitNew

As well as changes to the vdl-generated error definitions.  Given
a vdl error Foo, we create a var ErrFoo holding the IDAction, and
a func NewErrFoo to create the error.

MultiPart: 1/5
Change-Id: I215641063c830b9add0eb1736ea174e191aca299
76 files changed
tree: 85bbc210a71a81b00c670bd536214f568f024fdb
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/