COMPMID-1086: Optimizing GCGEMM - Add helpers to get target GPU information

This patch moves some of the helper functions in CLHelpers.[h,cpp] to
GPUTarget.[h,cpp] in order to make them avaialable to both CL and GLES backends.

Change-Id: Ib89b05a2084b73eb643b32fac13b8367cc80b6a5
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/128988
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/tests/GLES_COMPUTE/Helper.h b/tests/GLES_COMPUTE/Helper.h
index c2cd7c0..65f9926 100644
--- a/tests/GLES_COMPUTE/Helper.h
+++ b/tests/GLES_COMPUTE/Helper.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -35,8 +35,6 @@
 {
 namespace test
 {
-namespace gles_compute
-{
 /** Helper to create an empty tensor.
  *
  * @param[in] shape                Desired shape.
@@ -92,7 +90,6 @@
     std::cout << s.str().c_str();
     t.unmap();
 }
-} // namespace gles_compute
 } // namespace test
 } // namespace arm_compute
 #endif /* __ARM_COMPUTE_TEST_GC_HELPER_H__ */