Migrate some of the unit tests at `lib/cmsis_dsp`
to the new ztest API:
* lib/cmsis_dsp/basicmath
* lib/cmsis_dsp/bayes
* lib/cmsis_dsp/complexmath
* lib/cmsis_dsp/distance
* lib/cmsis_dsp/fastmath
`lib/cmsis_dsp/common/test_common.h` has been adapted to use the new
ztest API for the test variant macros, when enabled.
Signed-off-by: Tristan Honscheid <honscheid@google.com>
This commit adds the test application for the CMSIS-DSP 'basic math'
functions.
This test application is loosely based on the C++ test suite included
in the upstream CMSIS-DSP distribution.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>