Added plumed- prefix

See 9b50841c

patches/gromacs-2021.config

@@ -31,6 +31,6 @@ plumed_before_patch(){
   plumed_patch_info
   
   mv cmake/gmxVersionInfo.cmake cmake/gmxVersionInfo.cmake.preplumed
-  awk -v version="$PLUMED_VERSION" '/^set\(GMX_VERSION_STRING_OF_FORK/{gsub(/""/, version)}; {print}' cmake/gmxVersionInfo.cmake.preplumed > cmake/gmxVersionInfo.cmake
+  awk -v version="$PLUMED_VERSION" '/^set\(GMX_VERSION_STRING_OF_FORK/{gsub(/""/, "plumed-" version)}; {print}' cmake/gmxVersionInfo.cmake.preplumed > cmake/gmxVersionInfo.cmake
 }