trace-boot: automate instruction count on arm

Clean old trace boot results with new automated results.

qemu-trace2txt

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -eu
+. common
+set -- ${cli_qemu_trace2txt:-} "$@"
+while getopts a: OPT; do
+  case "$OPT" in
+    a)
+      arch="$OPTARG"
+      ;;
+  esac
+done
+set_common_vars "$arch" false
+./qemu/scripts/simpletrace.py \
+  "${build_dir}/host-qemu-custom/trace-events-all" \
+  "${qemu_out_dir}/trace.bin" \
+> "${qemu_trace_txt_file}"