Longer test patterns for BasicMaths, ComplexMaths and Statistics.
Corrected saturation bug in MVE code for arm_abs_q7,
arm_cmplx_conj_q15 and arm_cmplx_conj_q31.
Added test patterns for functions in BasicMaths.
Corrected github issue 622 (clarified comment for lms_norm_f32).
Added support for q63_t to the test framework.