Don't remove llvm/ADT/StringExtras.h

Author: JDevlieghere

lldb/tools/lldb-dap/lldb-dap.cpp

@@ -20,6 +20,7 @@
 #include "lldb/lldb-forward.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/ScopeExit.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Option/ArgList.h"