configure: Regenerated.

	* configure: Regenerated.
	* config.h.in: Regenerated.
	* acinclude.m4 (GLIBCXX_CHECK_SYSTEM_ERROR)  Add
	checks for ECHILD, ENOSPC, EPERM, ETIMEDOUT, and
	EWOULDBLOCK.
	*  config/os/mingw32/error_constants.h (errc): Add
	enumerator values no_child_process, no_space_on_device,
	not_supported, operation_not_permitted, operation_would_block,
	timed_out, and value_too_large,

From-SVN: r178257