All supported memory checkers now write their output to a file. Use a dummy
checker that ignores the given filename and ensure that the missing file is
reported as error.
The code for the tests is basically the same for all those subtests, so have
one template and configure that for as many tests as possible to make it
easier maintainable.
The memory checker command can't be quoted at this point, because previously it
has been tested that the given file exists, which will fail if the name is
quoted. The CTestTestMemcheckUnknown test aimed to test this case, has always
failed to do so and serves no useful purpose therefore.
The dummy memory tester implementation now understands the command line
switches for all memory checkers to redirect the output to a file. This avoids
triggering the error cases for BoundsChecker and Purify because the output file
does not exist.
Rolf Eike Beer