makepanda: also use -undefined dynamic_lookup for OpenEXR for now

makepanda/makepanda.py

@@ -1024,6 +1024,8 @@ if (COMPILER=="GCC"):
             LibName("FFMPEG", "-undefined dynamic_lookup")
         if not PkgSkip("ASSIMP"):
             LibName("ASSIMP", "-undefined dynamic_lookup")
+        if not PkgSkip("OPENEXR"):
+            LibName("OPENEXR", "-undefined dynamic_lookup")
 
     if GetTarget() == 'android':
         LibName("ALWAYS", '-llog')