bug#27152: deprecation warnings with Guile 2.2.2

[Ricardo Wurmus]

I get a couple of deprecation warnings with Guile 2.2.2, for example

    Import (ice-9 threads) to have access to `current-processor-count'.
    `_IOFBF' is deprecated.  Use the symbol 'block instead.

I only see them after “export GUILE_WARN_DEPRECATED=detailed”.  Without
that variable I get a block of text that informs me that deprecated
features have been used.

This happens especially when running “make” or when not all files have
been compiled.

-- 
Ricardo

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