Simplify naming of the zipped log to avoid errors on some platform.

Author: briacp

src/main/java/net/briac/omegat/plugin/omt/ManageOMTPackage.java

@@ -663,7 +663,7 @@ public static void createOmt(final File omtZip, final ProjectProperties props) t
             fhandler.close();
 
             // Add logfile
-            out.putNextEntry(new ZipEntry(path.relativize(Paths.get(logFile)).toString().replace("\\", "/")));
+            out.putNextEntry(new ZipEntry(OConsts.DEFAULT_INTERNAL + '/' + OMT_PACKER_LOGNAME));
             Files.copy(Paths.get(logFile), out);
             out.closeEntry();
         }