Add memcheck for tests about keygen HOT 5 CLOSED

grok-machine:build dendisuhubdy$ ctest
Test project /Users/dendisuhubdy/dev/keygen/build
    Start 1: ArgumentTest
1/6 Test #1: ArgumentTest .....................   Passed    0.01 sec
    Start 2: FormatTest
2/6 Test #2: FormatTest .......................   Passed    0.01 sec
    Start 3: MemoryTest
3/6 Test #3: MemoryTest .......................***Failed    0.18 sec
    Start 4: DataTest
4/6 Test #4: DataTest .........................   Passed    0.01 sec
    Start 5: OptionsTest
5/6 Test #5: OptionsTest ......................   Passed    0.01 sec
    Start 6: MockedTest
6/6 Test #6: MockedTest .......................   Passed    0.01 sec

83% tests passed, 1 tests failed out of 6

Total Test time (real) =   0.24 sec

The following tests FAILED:
	  3 - MemoryTest (Failed)
Errors while running CTest
grok-machine:build dendisuhubdy$ ctest
Test project /Users/dendisuhubdy/dev/keygen/build
    Start 1: ArgumentTest
1/6 Test #1: ArgumentTest .....................   Passed    0.01 sec
    Start 2: FormatTest
2/6 Test #2: FormatTest .......................   Passed    0.01 sec
    Start 3: MemoryTest
3/6 Test #3: MemoryTest .......................***Failed    0.22 sec
    Start 4: DataTest
4/6 Test #4: DataTest .........................   Passed    0.01 sec
    Start 5: OptionsTest
5/6 Test #5: OptionsTest ......................   Passed    0.01 sec
    Start 6: MockedTest
6/6 Test #6: MockedTest .......................   Passed    0.01 sec

83% tests passed, 1 tests failed out of 6

Total Test time (real) =   0.28 sec

The following tests FAILED:
	  3 - MemoryTest (Failed)
Errors while running CTest