get-distro-clang.sh: Do not show error if results.log does not exist

Signed-off-by: Nathan Chancellor <nathan@kernel.org>

Author: nathanchance

distro-clang/get-distro-clang.sh

@@ -64,7 +64,7 @@ distros=(
 base=$(dirname "$(readlink -f "$0")")
 results=$base/results.log
 
-rm "$results"
+rm -f "$results"
 
 for distro in "${distros[@]}"; do
     distro=docker.io/$distro