Added unit tests for the new svm_c_linear_dcd_trainer object.

dlib/test/CMakeLists.txt

@@ -116,6 +116,7 @@ set (tests
    std_vector_c.cpp
    string.cpp
    svm_c_linear.cpp
+   svm_c_linear_dcd.cpp
    svm.cpp
    svm_multiclass_linear.cpp
    svm_struct.cpp

dlib/test/makefile

@@ -131,6 +131,7 @@ SRC += statistics.cpp
 SRC += std_vector_c.cpp
 SRC += string.cpp
 SRC += svm_c_linear.cpp
+SRC += svm_c_linear_dcd.cpp
 SRC += svm.cpp
 SRC += svm_multiclass_linear.cpp
 SRC += svm_struct.cpp