applied fix in the file that had been already applied to the master branch  - replacing gnu++11 flag by c++0x flag
applied fix in the file that had been already applied to the master branch  - replacing gnu++11 flag by c++0x flag


Former-commit-id: 45183be89e93c0ca23635d13e3e9caf774887983
kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework,kmuzalewska/j-pet-framework