If the proposed Solaris 11 buildbots

	https://sourceware.org/ml/gdb/2018-09/msg00004.html

are considered worthwhile, here's a patch to introduce them.  It's
completely untested of course (I cannot even check syntactic validity),
and there are a couple of caveats:

* While a regular gdb build succeeds, a -g -D_GLIBCXX_DEBUG build as
  used by the buildbot fails as reported in PR build/23676.  This can be
  avoided either by performing a -g -O build or with
  --disable-unit-tests from Sergio's proposed patch.

* The buildslaves are configured to be compile-only at the moment: at
  -j4, a build takes ca. 15 minutes, while make check takes 1h 15 due to
  many timeouts (mostly in gdb.threads).  Until those are resolved, it's
  probably useless to run the tests.

* I couldn't find proper documentation for at least two fields:

** arch in config.json (slaves), seems to be unused AFAICT

** tags in config.json (builders)

Comments?

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University