if the forwarding pointer has been used and is later replaced by &bottom

prevent unnecessary eval's of partial function calls,
prevent thunk lifting of strict constructors with constant and evaluated arguments

instead use FILE pointer variables std_out_file_p and std_error_file_p,
using freopen caused problems on MacOSX with the named pipes that are
used by batchbuild to communicate with the compiler(s).

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instead of scanning all constructors to find it in BERecordType,
(should be passed directly to BERecordType)

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because the frontend uses -1 for no line number, the backend 0

(causes crash because field node_strict_node_ids doesn't exist)