GL_ARB_compute_shader required for OpenGL < 4.3

GL_ARB_compute_shader required for OpenGL < 4.3

GL_ARB_compute_shader is part of OpenGL 4.3 and above.

For older versions, it is required to enable it explicitly.

Fixes:
KHR-GL31.CommonBugs.CommonBug_ParenthesisInLayoutQualifierIntegerValue
KHR-GL32.CommonBugs.CommonBug_ParenthesisInLayoutQualifierIntegerValue
KHR-GL33.CommonBugs.CommonBug_ParenthesisInLayoutQualifierIntegerValue
KHR-GL40.CommonBugs.CommonBug_ParenthesisInLayoutQualifierIntegerValue
KHR-GL41.CommonBugs.CommonBug_ParenthesisInLayoutQualifierIntegerValue
KHR-GL42.CommonBugs.CommonBug_ParenthesisInLayoutQualifierIntegerValue

Components: OpenGL

VK-GL-CTS issue: 818

Change-Id: I8e7ab78e29861547f0379feebce0375e1dabf47c