acinclude.m4 (GLIBCXX_CHECK_SYSTEM_ERROR): Add ENOLINK, EPROTO for netbsd.

2007-08-24  Benjamin Kosnik  <bkoz@redhat.com>

	* acinclude.m4 (GLIBCXX_CHECK_SYSTEM_ERROR): Add ENOLINK, EPROTO
	for netbsd.
	* configure: Regenerate.
	* include/std/system_error: Guard.	
	* testsuite/19_diagnostics/headers/system_error/
	types_std_c++0x.cc: Same.
	* testsuite/19_diagnostics/error_category/cons/copy_neg.cc: Adjust
	line numbers.

From-SVN: r127772