units: report .i test as FIXED if its exit-status is 0 and no expected.tags is prepared

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
units: add UNITS_TIMEOUT parameter

With given UNITS_TIMEOUT an integer more than 0, units target
runs misc/units with --with-timeout=N option.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
units, ada: mark ada-function.i as normal test case

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
units, ada: mark ada-protected.b as normal test case

Signed-off-by: Masatake YAMATO <yamato@redhat.com>