Instead of giving the following warning, hide it since we don't plan to change it.
WARNING: rust-native-1.54.0-r0 do_populate_sysroot: File '/media/build1/poky/build/tmp/work/x86_64-linux/rust-native/1.54.0-r0/recipe-sysroot-native/usr/lib/rustlib/x86_64-linux/bin/rust-llvm-dwp' from rust-native was already stripped, this will prevent future debugging!
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
