vendor dependencies, make some changes to how input is done

vendor/github.com/ebitengine/purego/internal/fakecgo/asm_amd64.s

@@ -0,0 +1,39 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+#include "abi_amd64.h"
+
+// Called by C code generated by cmd/cgo.
+// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
+// Saves C callee-saved registers and calls cgocallback with three arguments.
+// fn is the PC of a func(a unsafe.Pointer) function.
+// This signature is known to SWIG, so we can't change it.
+TEXT crosscall2(SB), NOSPLIT, $0-0
+	PUSH_REGS_HOST_TO_ABI0()
+
+	// Make room for arguments to cgocallback.
+	ADJSP $0x18
+
+#ifndef GOOS_windows
+	MOVQ DI, 0x0(SP) // fn
+	MOVQ SI, 0x8(SP) // arg
+
+	// Skip n in DX.
+	MOVQ CX, 0x10(SP) // ctxt
+
+#else
+	MOVQ CX, 0x0(SP) // fn
+	MOVQ DX, 0x8(SP) // arg
+
+	// Skip n in R8.
+	MOVQ R9, 0x10(SP) // ctxt
+
+#endif
+
+	CALL runtime·cgocallback(SB)
+
+	ADJSP $-0x18
+	POP_REGS_HOST_TO_ABI0()
+	RET