test: new test for gollvm compiler crash bug

Reduced test case for gollvm compiler crash building docker-ce.

Updates #35586.

Change-Id: Ib805dc9ab7b63cc61f207f1f000bef9809cfd428
Reviewed-on: https://go-review.googlesource.com/c/go/+/207258
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

test/fixedbugs/issue35586.dir/a.go

+// Copyright 2019 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.
+
+package a
+
+func D(_ string, _ int) (uint64, string) {
+	return 101, "bad"
+}

test/fixedbugs/issue35586.dir/b.go

+// Copyright 2019 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.
+
+package b
+
+import "a"
+
+func F(addr string) (uint64, string) {
+	return a.D(addr, 32)
+}

test/fixedbugs/issue35586.go

+// compiledir
+
+// Copyright 2019 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.
+
+// Issue 35586: gollvm compiler crash building docker-ce; the problem
+// involves inlining a function that has multiple no-name ("_") parameters.
+//
+
+package ignored