string_conversions.cc: Remove.

2008-06-29  Paolo Carlini  <paolo.carlini@oracle.com>

	* src/string_conversions.cc: Remove.
	* config/abi/pre/gnu.ver: Delete exports.
	* src/Makefile.am: Update.
	* include/ext/string_conversions.h: Add.
	* include/Makefile.am: Update.
	* include/bits/basic_string.h: Include string_conversions.h,
	define numeric conversion functions.
	* include/ext/vstring.h: Likewise.
	* src/Makefile.in: Regenerate.
	* include/Makefile.in: Regenerate.

From-SVN: r137253