tools/syz-trace2syz: add go-fuzz fuzzer

Inputs like "2__R" or "3_F	T.3.3l" make
traze2syz hang infinitely consuming all machine memory.
Need to fix all crashes over time.

tools/syz-trace2syz/proggen/fuzz.go

@@ -0,0 +1,29 @@
+// Copyright 2018 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package proggen
+
+import (
+	"github.com/google/syzkaller/prog"
+	_ "github.com/google/syzkaller/sys"
+)
+
+var target = func() *prog.Target {
+	target, err := prog.GetTarget("linux", "amd64")
+	if err != nil {
+		panic(err)
+	}
+	target.ConstMap = make(map[string]uint64)
+	for _, c := range target.Consts {
+		target.ConstMap[c.Name] = c.Value
+	}
+	return target
+}()
+
+func Fuzz(data []byte) int {
+	progs, err := ParseData(data, target)
+	if err != nil {
+		return 0
+	}
+	return len(progs)
+}