Fix license header in TraceHTR.h

[pietroalbini]

Summary

It seems like the license header got mangled somehow, joining multiple
lines together and splitting some lines across multiple ones. That is
causing errors in a license checker I'm using (called REUSE).

This commit restores the license header to the format used by the rest
of the files in the project.

[durin42]

Looks obviously correct to me.

lldb/source/Plugins/TraceExporter/common/TraceHTR.h

 //===-- TraceHTR.h --------------------------------------------------------===//
 //
-// 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
+// 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 LLDB_TARGET_TRACE_HTR_H
 #define LLDB_TARGET_TRACE_HTR_H
 
 #include "lldb/Target/Thread.h"
 #include "lldb/Target/Trace.h"