errno.c (__get_errno, [...]): Transform then into weak symbols so we use the version provided by MaRTE when...

2008-08-20  Jose Ruiz  <ruiz@adacore.com>

	* errno.c (__get_errno, __set_errno for MaRTE): Transform then into
	weak symbols so we use the version provided by MaRTE when available.

From-SVN: r139332