Only disable gmp on older mac for nightly testing.

The newer mac environment should be able to support gmp.
Couple of futures using setter in the where clause.
Update future text.
Merge branch 'master' of github.com:chapel-lang/chapel into test
Merge pull request #338 from sungeunchoi/test

Add a couple of futures using setting in where clause.

These are similar to test/functions/bharshbarg/setterInWhere.future (which does the same for `proc this`), but these get a different error message.
Merge pull request #339 from thomasvandoren/update-common-for-old-mac

Only disable gmp on older mac for nightly testing.

The newer mac environment should be able to support gmp.
Add .compopts file to genericArrayInClass-otharrs-inline-iterators test.

Put "--savec obj" in a .compopts file to make paths C compilation error messages more
stable, to support comparison against the .bad file.
Add genericArrayInClass-otharrs-inline-iterators.cleanfiles to clean up obj/
Merge pull request #340 from hildeth/addOtharrsFuture

Add otharrs future

Put "--savec obj" in a .compopts file to make paths C compilation error messages more
stable, to support comparison against the .bad file.
runtime/qio: use getcwd instead of getwd

Included code for handling errors.

Related to #325.