Attempt to fix non compatible (newer) .3mf and .amf import error handling on Linux and OsX

src/libslic3r/Format/3mf.cpp

@@ -567,7 +567,7 @@ namespace Slic3r {
                     {
                         // ensure the zip archive is closed and rethrow the exception
                         close_zip_reader(&archive);
-                        throw e;
+                        throw std::runtime_error(e.what());
                     }
                 }
             }

src/libslic3r/Format/AMF.cpp

@@ -872,7 +872,7 @@ bool load_amf_archive(const char* path, DynamicPrintConfig* config, Model* model
                 {
                     // ensure the zip archive is closed and rethrow the exception
                     close_zip_reader(&archive);
-                    throw e;
+                    throw std::runtime_error(e.what());
                 }
 
                 break;