GLES3 tests for equality of structs with array members

GLES3 tests for equality of structs with array members

The new test case adds regression coverage for the Qualcomm driver
shader compiler crash seen in Android N:
https://crbug.com/695687
It is a port of this WebGL test case:
https://github.com/KhronosGroup/WebGL/blob/master/sdk/tests/conformance2/glsl3/compare-structs-containing-arrays.html

New tests: dEQP-GLES3.functional.shaders.struct.local.array_member_equality_vertex, dEQP-GLES3.functional.shaders.struct.local.array_member_equality_fragment
Components: AOSP
Change-Id: Ie130439f80fddb081fb36db02c24a9e18f5c4bca