buildbot-build.sh: add a note that linkerconfig error is not fatal.

Bug: none
Test: ran tests in chroot as described in art/test/README.chroot.md,
      observed the note
Change-Id: Id541f736713b90d313a41f2bfe924a880460dc75
diff --git a/tools/buildbot-build.sh b/tools/buildbot-build.sh
index 12ce461..b08a231 100755
--- a/tools/buildbot-build.sh
+++ b/tools/buildbot-build.sh
@@ -16,6 +16,8 @@
 
 set -e
 
+. "$(dirname $0)/buildbot-utils.sh"
+
 shopt -s failglob
 
 if [ ! -d art ]; then
@@ -387,4 +389,6 @@
   rm -rf $linkerconfig_out
   mkdir -p $linkerconfig_out
   $ANDROID_HOST_OUT/bin/linkerconfig --target $linkerconfig_out --root $linkerconfig_root --vndk $platform_version
+  echo -e "${boldcyan}note:${nc} Don't be scared by \"Unable to access VNDK APEX\" message," \
+      " it's not fatal"
 fi