solve function
Implementation
(bool success, VARP out) solve(VARP src1, VARP src2, {int flags = DECOMP_LU}) {
final pOut = calloc<c.VARP_t>();
final success = c.mnn_cv_solve(src1.ptr, src2.ptr, flags, pOut);
final rval = (success, VARP.fromPointer(pOut.value));
calloc.free(pOut);
return rval;
}