Revert:
	* lib/gcc-dg.exp (dg-build-dso): New.
	(gcc-dg-test-1): Handle dg-do-what "dso".

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@209353 138bc75d-0d04-0410-961f-82ee72b054a4