Merge topic 'GNU-FindBinUtils-no-policy'

8fc934de GNU-FindBinUtils: Avoid setting policy CMP0054

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !572

Modules/Compiler/GNU-FindBinUtils.cmake

-cmake_policy(SET CMP0054 NEW)
-
-if("${_CMAKE_PROCESSING_LANGUAGE}" STREQUAL "")
+if(NOT DEFINED _CMAKE_PROCESSING_LANGUAGE OR _CMAKE_PROCESSING_LANGUAGE STREQUAL "")
   message(FATAL_ERROR "Internal error: _CMAKE_PROCESSING_LANGUAGE is not set")
 endif()