Get source symbols for more types of C/C++ files

More file extensions which are C/C++ files:

- .hpp
- .m (objective C)
- .inl
- .hh
- .cc
- .cxx
- .hxx

We should test to see if we are getting source symbols correctly from these here, and add these at https://github.com/aboutcode-org/scancode.io/blob/main/scanpipe/pipes/d2d_config.py

These are observed in MacOS/Windows projects in:
- https://github.com/aboutcode-org/scancode.io/issues/1470
- https://github.com/aboutcode-org/scancode.io/issues/1471