tuple: Ifndef __GXX_EXPERIMENTAL_CXX0X__ just error out.

tuple: Ifndef __GXX_EXPERIMENTAL_CXX0X__ just error out.

2008-05-25  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/tuple: Ifndef __GXX_EXPERIMENTAL_CXX0X__ just error out.
	* include/std/date_time: Likewise.
	* include/std/system_error: Likewise.
	* include/std/type_traits: Likewise; fix typo in macro name.
	* include/std/regex: Likewise.
	* include/std/random: Likewise.
	* include/std/unordered_map: Likewise.
	* include/std/condition_variable: Likewise.
	* include/std/unordered_set: Likewise.
	* include/std/mutex: Likewise.
	* include/std/array: Likewise.

	* include/c_std/cmath: Fix obsolete comment.
	* include/c_global/cmath: Likewise.

From-SVN: r135890