SWDEV-443537 - Fix cmake build warning

Update cmake minimum requirement on deprecated cmake version (2.8.11) to non-deprecated version (3.5)

Change-Id: Ib76d241babf475a26464e8b12b91d67e48f72b60

opencl/khronos/headers/opencl2.2/tests/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.8.11)
+cmake_minimum_required (VERSION 3.5)
 
 project(OpenCL_Headers_Tests)
 

opencl/khronos/icd/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.8.11)
+cmake_minimum_required (VERSION 3.5)
 
 project (OPENCL_ICD_LOADER)
 include (GNUInstallDirs)