use Carbon APIs that aren't available there.
This patch disables tests for the affected entrypoints in macostools and
mentions this in the documentation.
In theory it is possible to replace the implementation by code that does
work in 64-bit mode, but that would require further updates to the Carbon
wrappers because the modern APIs aren't wrapped properly.
tests that expect to be skipped if imports fail or functions don't
exist to use import_function and import_module. The ultimate goal is
to change regrtest to not skip automatically on ImportError. Checking
in now to make sure the buldbots don't show any errors on platforms
I can't direct test on.
is pointless.
Also add a note to the docs for the 'test' package that test cases should check
first that any conditions needed in the operating system are met before having
a test run.
Closes bug #1077302. THanks, Ian Holsman.