- Fix crash on the inlined functions support.
- Fix crash from the PIE support, its varobj_refresh() was called only
before varobj_invalidate() which is sufficient.
- Fix BuildRequires for the `--with testsuite' runs.
- Use the newly introduced `--with-pythondir' option.
- Remove libstdcxx [python] pretty printers (as included in libstdc++ rpm
now).