FreeBSD-specific test output (mainly just different default buffer sizes).

Solaris-specific versions of stdout for these tests (the default block
size differs on Solaris, which means that Show-ing a Handle gives
slightly different output).

The Solaris build should have zero unexpected test failures now.

Skip test ffi005 due to non-portability

update expected output (which was wrong)

conc021: update expected output and exit code

Fix 32-bit assumption: Int is not CInt

Finally fix foreign export and foreign import "wrapper" so that
exceptions raised during the call are handled properly rather than
causing the RTS to bomb out.

In particular, calling System.exitWith in a foreign export will cause
the program to terminate cleanly with the desired exit code.  All
other exceptions are printed on stderr (and the program is
terminated).

Details:

GHC.TopHandler.runMain is now called runIO, and has type IO a -> IO a
(previously it had type IO a -> IO (), but that's not general enough
for a foreign export).  The stubs for foreign export and forein import
"wrapper" now automatically wrap the computation in runIO or its dual,
runNonIO.  It turned out to be simpler to do it this way than to do
the wrapping in Haskell land (plain foreign exports don't have
wrappers in Haskell).

Test recursive newtype deriving

Add tc158

Add tc157

GlaExts ==> GHC.Exts

Update expected output

Add test for instance decl context validity

Add one of Alastair Reid's FFI tests, with modifications to get it to
run under GHC.

Turn off conc037 and conc038 for now: these depend on $(GhcThreadedRts).

Sync with new seq story

update to not use the lang package

add another missing end-of-line test for hGetLine

Omit bogus ambiguity report after a no-instance error

More accurate error message

Remove ./ from error messages

Tiny Makefile tidy-up

Update expected output

Update expected output

negated parameters fixed; should dsrun009 should pass now

Use let syntax for implicit params

Use let syntax instead of with for implicit params

Replace bogus error with the real thing

Add an array read and show test

Update expected results

Add test for hGetLine on file without a final '\n'.

Switch to let syntax for implicit parameters

Remove tc022; already in dsrun009

Wibbles

Add pattern-match negation test

Add infix tycon test

conc005 is based on the old concurrent package, so imports and
compiler flags had to be tweaked. Is this test still needed?

Add test for correct 'negate' handling (currently an expected failure).

More tests for type validity