GCC 4.3 target deprecation proposals

[DJ Delorie]

> DJGPP,

Please don't deprecate this.  It's actively used, but the test harness
doesn't run under DJGPP so testing it is difficult.  I don't think
we've *ever* run the testsuite for it.

> s390x-ibm-tpf*

Similar.  TPF is cross, and there's no simulators, so no test results,
yet still active.

> -pe targets are not being tested either);

That would be cygwin, for i686 ;-)