orca-c: patch dependency resolution on darwin (#160612)

Co-authored-by: Sandro <[e-mail]>

pkgs/applications/audio/orca-c/default.nix

···
 
   postPatch = ''
     patchShebangs tool
+    sed -i tool \
+      -e 's@ncurses_dir=.*@ncurses_dir="${ncurses}"@' \
+      -e 's@portmidi_dir=.*@portmidi_dir="${portmidi}"@' tool
   '';
 
   installPhase = ''