CMakeFindBinUtils: Always consider plain binutils when not cross-compiling
requested to merge robertmaynard/cmake:fallback_to_non_toolchain_prefix_tools_when_not_cross_compiling into master
Since !4547 (merged), _CMAKE_TOOLCHAIN_PREFIX may be set even when not cross-compiling. In this case we may still need to use binutils without any prefix.
Fixes: #21103 (closed)
Backport: release
Topic-rename: CMakeFindBinUtils-fallback
Edited by Brad King