gl case double glutInit issue

[energystoryhhl]

I found an issue about CTS running gl / CL-GL interop case issue, I found glutInit double called in CTS CLGL test case code, which will lead to an error:

            freeglut (./test_gl): illegal glutInit() reinitialization attempt

root cause is in: test_conformance/gl/main.cpp:343

            if (glEnv->Init(&argc, (char **)argv, CL_TRUE))

the glEnv->Init has already called in same file line:260, the function glutInit in glEnv->Init can not be called twice, then a error will occur although all the gl / CLGL cases are passed. Then in the full quick CTS running it will appear:

            (12-Jul 03:54:01)     BEGIN  OpenCL-GL Sharing                       : 
           PASSED sub-test.
           PASSED 23 of 23 tests.
           (12-Jul 04:01:48)     FAILED OpenCL-GL Sharing                       : (467s, test  34/53)

Although all the gl/CLGL cases are passed, but this group test is judged to failed. Can you please help to take a look?

[bashbaug]

Probably related to #1885?

[energystoryhhl]

Probably related to #1885?

I found this issue has been solved:
02471c8

[energystoryhhl]

@bashbaug I created a PR:#2023 to fix gluinit issue in osx, can you please help to review? Can you please help to review it?

[energystoryhhl]

#2023 fixed osx gl double init issue.