Always compile the C++11 related unit tests.

dlib/test/CMakeLists.txt

@@ -150,18 +150,12 @@ set (tests
    tuple.cpp
    type_safe_union.cpp
    vectorstream.cpp
+   dnn.cpp
+   cublas.cpp
+   find_optimal_parameters.cpp
+   elastic_net.cpp
    )
 
-# Tests that require C++11 support
-if (COMPILER_CAN_DO_CPP_11)
-   set(tests ${tests}
-      dnn.cpp
-      cublas.cpp
-      find_optimal_parameters.cpp
-      elastic_net.cpp
-      )
-endif()
-
 
 # add all the cpp files we want to compile to this list.  This tells
 # cmake that they are part of our target (which is the executable named dtest)