compiler: implement Go 1.1 spec of terminating statements.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200047 138bc75d-0d04-0410-961f-82ee72b054a4
Daily bump.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200052 138bc75d-0d04-0410-961f-82ee72b054a4