GMP 5.1.1 make check fail on Solaris 11

[Torbjorn Granlund]

  > perhaps we should add an initial test t-does-exception-work-at-all.cc?
  
  Sounds like a good idea!

If we reorder the test, so that he last 4 tests that are run are
t-does-exception-work-at-all, t-assign, t-constr, and t-rand are run
last, it might give users a clue.  If these are the only failing tests,
and users feel like using the C++ with potentially dangerouse exception
behaviour ("derail execution to some arbitrary position in memory"),
then that's their decision.

-- 
Torbjörn