cmake swig warnings

```
CMake Warning (dev) at /usr/share/cmake-3.21/Modules/UseSWIG.cmake:765 (message):
Policy CMP0078 is not set: UseSWIG generates standard target names. Run
"cmake --help-policy CMP0078" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.

Call Stack (most recent call first):
src/python/CMakeLists.txt:8 (swig_add_library)
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/share/cmake-3.21/Modules/UseSWIG.cmake:607 (message):
Policy CMP0086 is not set: UseSWIG honors SWIG_MODULE_NAME via -module
flag. Run "cmake --help-policy CMP0086" for policy details. Use the
cmake_policy command to set the policy and suppress this warning.

Call Stack (most recent call first):
/usr/share/cmake-3.21/Modules/UseSWIG.cmake:877 (SWIG_ADD_SOURCE_TO_MODULE)
src/python/CMakeLists.txt:8 (swig_add_library)
This warning is for project developers. Use -Wno-dev to suppress it.
```