AppleHV enablement pass #2

* Use vfkit command line assembly
* Inject ignition file into guest using http over vsock
* Ready notification through use of vsock

[NO NEW TESTS NEEDED]

Signed-off-by: Brent Baude <bbaude@redhat.com>

vendor/github.com/twitchyliquid64/golang-asm/objabi/symkind.go

@@ -0,0 +1,79 @@
+// Derived from Inferno utils/6l/l.h and related files.
+// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/l.h
+//
+//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
+//	Portions Copyright © 1997-1999 Vita Nuova Limited
+//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
+//	Portions Copyright © 2004,2006 Bruce Ellis
+//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
+//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
+//	Portions Copyright © 2009 The Go Authors. All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package objabi
+
+// A SymKind describes the kind of memory represented by a symbol.
+type SymKind uint8
+
+// Defined SymKind values.
+// These are used to index into cmd/link/internal/sym/AbiSymKindToSymKind
+//
+// TODO(rsc): Give idiomatic Go names.
+//go:generate stringer -type=SymKind
+const (
+	// An otherwise invalid zero value for the type
+	Sxxx SymKind = iota
+	// Executable instructions
+	STEXT
+	// Read only static data
+	SRODATA
+	// Static data that does not contain any pointers
+	SNOPTRDATA
+	// Static data
+	SDATA
+	// Statically data that is initially all 0s
+	SBSS
+	// Statically data that is initially all 0s and does not contain pointers
+	SNOPTRBSS
+	// Thread-local data that is initially all 0s
+	STLSBSS
+	// Debugging data
+	SDWARFCUINFO
+	SDWARFCONST
+	SDWARFFCN
+	SDWARFABSFCN
+	SDWARFTYPE
+	SDWARFVAR
+	SDWARFRANGE
+	SDWARFLOC
+	SDWARFLINES
+	// ABI alias. An ABI alias symbol is an empty symbol with a
+	// single relocation with 0 size that references the native
+	// function implementation symbol.
+	//
+	// TODO(austin): Remove this and all uses once the compiler
+	// generates real ABI wrappers rather than symbol aliases.
+	SABIALIAS
+	// Coverage instrumentation counter for libfuzzer.
+	SLIBFUZZER_EXTRA_COUNTER
+	// Update cmd/link/internal/sym/AbiSymKindToSymKind for new SymKind values.
+
+)