tools/process_config.sh: Fix sed errors

Ignore commented-out lines when deleting repeated defines in defconfig

Signed-off-by: Antoine Juckler <6445757+ajuckler@users.noreply.github.com>

tools/process_config.sh

@@ -57,8 +57,10 @@ process_file() {
             fi
         else
             if [[ -n "$line" ]]; then
+                if [[ ! "$line" == \#* ]]; then
                     local key_config="$(echo "$line" | cut -d= -f1)="
                     sed -i.backup "/^$key_config/d" "$output_file"
+                fi
                 echo "$line" >> "$output_file"
             fi
         fi