Add NetBSD case in Entry::Type::ThreadID

[krytarowski]

Summary

NetBSD native threads are printed as 64-bit unsigned integers.

The underlying system type of a thread identity is lwpid_t of type int32_t. For consistency with Linux and FreeBSD share the 64-bit unsigned integer type.

Sponsored by <The NetBSD Foundation>

source/Core/FormatEntity.cpp

             // setting and the default value of the setting can be different
             // depending on the platform.
             Target &target = thread->GetProcess()->GetTarget();
             ArchSpec arch(target.GetArchitecture());
             llvm::Triple::OSType ostype = arch.IsValid()
                                               ? arch.GetTriple().getOS()
                                               : llvm::Triple::UnknownOS;
             if ((ostype == llvm::Triple::FreeBSD) ||
-                (ostype == llvm::Triple::Linux)) {
+                (ostype == llvm::Triple::Linux) ||
+                (ostype == llvm::Triple::NetBSD)) {
               format = "%" PRIu64;
             }
           } else {
             format = entry.printf_format.c_str();
           }
         }
         s.Printf(format, thread->GetID());
         return true;