tests/invalid_onlydepend:
Move the one test case in tests/invalid for which we want to check
the error messages generated during the generation of dependencies
to this new test directory.
tests/invalid_nodepend:
Move all test cases in tests/invalid which get errors during the
generation of dependencies but for which we want to check the error
messages generated during normal compilation to this new test directory.
tests/invalid_nodepend/Mmakefile:
tests/invalid_nodepend/Mercury.options:
tests/invalid_onlydepend/Mmakefile:
tests/invalid_onlydepend/Mercury.options:
Versions of the same files in tests/invalid, but containing only
the entries relevant to the moved test cases.
tests/invalid/Mmakefile:
tests/invalid/Mercury.options:
Delete the entries that refer to the moved test cases.
tests/README:
Document the two new test directories.
tools/bootcheck:
Add invalid_onlydepend and invalid_nodepend to the list of
test directories.
