Test if mediump optimizations are not to aggressive

Test if mediump optimizations are not to aggressive

GTF sin and cos tests were ported to glcts as they can also
be used to detect overly optimized set of mediump operations.

Components: OpenGL

VK-GL-CTS issue: 706

Affects:
KHR-GL43.aggressive_optimizations.*
KHR-GLES2.shaders.aggressive_optimizations.*
KHR-GLES3.shaders.aggressive_optimizations.*
KHR-GLES31.shaders.aggressive_optimizations.*
KHR-GLES32.shaders.aggressive_optimizations.*

Change-Id: Idd2ea75ea552b9106792775570d64b347db32276