include missing <cstdlib> for std::abort

[raj.khem]

Summary

Fixes

TOPDIR/build/tmp/work-shared/llvm-project-source-10.0.0-r0/git/clang-tools-extra/clangd/Shutdown.cpp:21:10: error: no member named 'abort' in namespace 'std'

std::abort();
~~~~~^

TOPDIR/build/tmp/work-shared/llvm-project-source-10.0.0-r0/git/clang-tools-extra/clangd/Shutdown.cpp:30:10: error: no member named 'abort' in namespace 'std'

std::abort();
~~~~~^

[merge_guards_bot]

Unit tests: pass. 61133 tests passed, 0 failed and 728 were skipped.

clang-tidy: pass.

clang-format: pass.

Build artifacts: diff.json, clang-tidy.txt, clang-format.patch, CMakeCache.txt, console-log.txt, test-results.xml

[ilya-biryukov]

LGTM. Do you have commit access or should we land this for you?

[kadircet]

Looks like this has landed with https://github.com/llvm/llvm-project/commit/58592f6c49249293f79698cfcb31dba532e12603

clang-tools-extra/clangd/Shutdown.cpp

 //===--- Shutdown.cpp - Unclean exit scenarios ----------------------------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 
 #include "Shutdown.h"
 
 #include <atomic>
+#include <cstdlib>
 #include <thread>
 
 namespace clang {
 namespace clangd {
 
 void abortAfterTimeout(std::chrono::seconds Timeout) {
   // This is more portable than sys::WatchDog, and yields a stack trace.
   std::thread([Timeout] {