Enormous hack to deal with JS encoding issues in PDF.

No, PDFDocEncoding (as spit out by encodeStringForPlotter()) does
not seem to work.

Fixes https://gitlab.com/kicad/code/kicad/issues/12782

common/plotters/PDF_plotter.cpp

@@ -1231,7 +1231,11 @@ bool PDF_PLOTTER::EndPlot()
         fprintf( m_outputFile,
                  "   /A << /Type /Action /S /JavaScript /JS (%s) >>\n"
                  ">>\n",
+#ifdef __WXMAC__
                  js.ToStdString().c_str() );
+#else
+                 TO_UTF8( js ) );
+#endif
 
         closePdfObject();
     }