Fix continuous integration build problem.

[ysiraichi]

Enfield tests fail when compiled with Clang. The problem is with CNOTLBOWrapperPass which tries to order the statements. It stores the statements into a std::set of pointers. When compiled with different compilers, the order may change since it depends on the address.

Consider the following solutions:

• change what is expected of the tests (/tests/CNOTLBOWrapperPassTests.cpp) to be independent of order;
• change the Layer definition for CNOTLBOWrapperPass since even LayerBuilderPass is using a different definition.

Breaking #9

[ysiraichi]

The best approach for solving it seems to be the second option, since we can unify the Layer definition of CNOTLBOWrapperPass and LayerBuilderPass.