Update ARM sysroot in toolchain_revisions/arm_trusted.json
Update ARM sysroot in toolchain_revisions/arm_trusted.json

This brings in the following change:
  b5365b4 Remove chrome dependencies from ARM sysroot image

BUG=none
R=bradnelson@google.com

Review URL: https://codereview.chromium.org/1133293002

cohortfsllc/cohort-cocl2-sandbox,cohortfsllc/cohort-cocl2-sandbox,cohortfsllc/cohort-cocl2-sandbox,cohortfsllc/cohort-cocl2-sandbox,cohortfsllc/cohort-cocl2-sandbox,cohortfsllc/cohort-cocl2-sandbox