standard libraries and cmath libraries are included to use sqrt and abs function. added by Jay

swig dependency ported for newer GNURadio 3.8 compatibility

I know what's causing the problem. I use deprecated ${GNURADIO_RUNTIME_INCLUDE_DIRS} macro. After replacing
```bash
foreach(incdir ${GNURADIO_RUNTIME_INCLUDE_DIRS})
    list(APPEND GR_SWIG_INCLUDE_DIRS ${incdir}/gnuradio/swig)
endforeach(incdir)
```
with 

```bash
foreach(incdir ${GNURADIO_RUNTIME_INCLUDE_DIRS})
    #list(APPEND GR_SWIG_INCLUDE_DIRS ${incdir}/gnuradio/swig)
    list(APPEND GR_SWIG_INCLUDE_DIRS  "/usr/local/include/gnuradio/swig")
    list(APPEND GR_SWIG_INCLUDE_DIRS "/usr/include/gnuradio/swig")
endforeach(incdir)
```
everything works. However, this is a temporary solution. And while building using cmake put a flag `-DGNURADIO_ALL_INCLUDE_DIRS=/usr/include/gnuradio/swig` with cmake so it will definitely find the swig.

updated cmake flags.