Clean up the library testing story

Our story for testing libraries is in disarray, and needs cleaning up. Tests for libraries can now be placed in the repositories with the libraries themselves, and these tests are picked up when you say make in testsuite/tests/ghc-regress.

The following tests need to be moved into their respective packages, and in some cases given appropriate .T scripts:

• everything in testsuite/tests/libraries
• everything in testsuite/tests/ghc-regress/lib

tests that are package-specific but are really GHC regression tests should stay in the testsuite, and use the reqlib option.

Trac metadata

Trac field	Value
Version	6.7
Type	Task
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Test Suite
Test case
Differential revisions
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Blocking
CC
Operating system	Unknown
Architecture	Unknown