Add a fingerprint of the ARM OS source files to detect when a client expects another ARM image

tools/mkversion.sh

@@ -58,6 +58,11 @@ if [ "$fullgitinfoextra" != "$fullgitinfo" ]; then
     fullgitinfo46="${fullgitinfo%"${fullgitinfoextra}"}"
     fullgitinfo="${fullgitinfo46}..."
 fi
+sha=$(
+  pm3path=$(dirname -- "$0")/..
+  cd "$pm3path" || return
+  ls armsrc/*.[ch] common_arm/*.[ch]|grep -v disabled|grep -v version_pm3|xargs sha256sum|sha256sum|grep -o '^.........'
+)
 cat <<EOF
 #include "common.h"
 /* Generated file, do not edit */
@@ -74,5 +79,6 @@ const struct version_information_t SECTVERSINFO g_version_information = {
     $clean,
     "$fullgitinfo",
     "$ctime",
+    "$sha"
 };
 EOF