HPCC-15231 Clang warnings from inconsistent override

Will take a long time to fix all the inconsistencies... Until then it's better
to suppress the warning.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>

cmake_modules/commonSetup.cmake

@@ -396,7 +396,7 @@ IF ("${COMMONSETUP_DONE}" STREQUAL "")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -Werror=bitwise-op-parentheses -Werror=tautological-compare")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -Wno-switch-enum -Wno-format-zero-length -Wno-switch")
       SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -Qunused-arguments")  # Silence messages about pthread not being used when linking...
-      
+      SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}  -Wno-inconsistent-missing-override")   # Until we fix them all, whcih would be a huge task...      
       if (CLANG_VERSION VERSION_GREATER 3.6 OR CLANG_VERSION VERSION_EQUAL 3.6 OR APPLE_CLANG_VERSION VERSION_GREATER 6.0)
         SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-pointer-bool-conversion")
       endif()