Update README.md including source files

gromacs/README.md

@@ -148,6 +148,12 @@ the corresponding NAMD benchmark. It contains 28 million atoms and uses PME for
 
 Download test Case C [https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_TestCaseC.tar.xz](https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_TestCaseC.tar.xz)
    
+The source files necessary to build tpr for future versions are :
+- [https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_InputsSource_TestCaseA.tar.xz](https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_InputsSource_TestCaseA.tar.xz)
+- [https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_InputsSource_TestCaseB.tar.xz](https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_InputsSource_TestCaseB.tar.xz)
+- [https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_InputsSource_TestCaseC.tar.xz](https://repository.prace-ri.eu/ueabs/GROMACS/2.2/GROMACS_InputsSource_TestCaseC.tar.xz)
+
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 ## Performance 
 GROMACS reports in log file both time and performance.