cmake US_HAVE_TR1_UNORDERED_SET_H examples

MITK/MITK Modules/CppMicroServices/CMakeLists.txt :253 

CHECK_INCLUDE_FILE_CXX(tr1/unordered_set US_HAVE_TR1_UNORDERED_SET_H)

MITK/MITK Modules/CppMicroServices/CMakeLists.txt :311 

elseif(US_HAVE_TR1_UNORDERED_SET_H)