Josef Söntgen 6b48a08697 libc: silence noncritical dummy implementations
* isatty

  For the moment it is not possible to determine if the fd belongs to a
  tty. For whatever reasons, the check is done multiple times, e.g.
  'tclsh', which will spam the LOG.

* sysctl(HW_FLOATINGPT)

  FPU is enabled on all our platforms, so return true.

Fixes #3389.
2019-06-13 12:17:31 +02:00
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