* ltmain.sh (taglist): Initialized. Don't let `CC' tag out of it.

(relink_command): Added --tag flags.
(mode=install): If relinking fails; error out.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@50855 138bc75d-0d04-0410-961f-82ee72b054a4