tc: create helper to access toolchain tools

runtc

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -eu
+. common
+set -- ${cli_tc:-} "$@"
+while getopts a:gh OPT; do
+  case "$OPT" in
+    a)
+      arch="$OPTARG"
+      ;;
+    g)
+      gem5=true
+      ;;
+    h)
+      printf "Usage: $0 TOOL [TOOL_ARGS]...
+Call a built ToolChain tool. Example:
+
+    $0 -a arm readelf -h
+" 2>&1
+      exit 0
+      ;;
+  esac
+done
+shift "$(($OPTIND - 1))"
+tool="$1"
+shift
+set_common_vars "$arch" "$gem5"
+"${buildroot_out_dir}/host/bin/"*-buildroot-*"${tool}" "$@"
+exit "$?"