Add missing include (cstdlib) to Demangle.h

[kzhuravl]

Summary

One of our internal builders choked on free in Demangle.cpp.

[erik.pilkington]

LGTM!

[jhenderson]

LGTM, if it is moved into Demangle.cpp. I don't think we want to be adding unnecessary dependencies to headers, when a .cpp file change would suffice.

include/llvm/Demangle/Demangle.h

13

Shouldn't this be in Demangle.cpp, since the only usage is there?

[kzhuravl]

Will fix during committing. Thanks.

include/llvm/Demangle/Demangle.h

 //===--- Demangle.h ---------------------------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_DEMANGLE_DEMANGLE_H
 #define LLVM_DEMANGLE_DEMANGLE_H
 
 #include <cstddef>
+#include <cstdlib>
 #include <string>
 
 namespace llvm {
 /// This is a llvm local version of __cxa_demangle. Other than the name and
 /// being in the llvm namespace it is identical.
 ///
 /// The mangled_name is demangled into buf and returned. If the buffer is not
 /// large enough, realloc is used to expand it.