Add an update.sh script to update the riscv64 sysroot

Test: ./update.sh 9553741
Change-Id: I0b8fa3c888767563b3baef41663914d3f81d6cc6
1 file changed
tree: 27e7fe926b7d48b809f8abe0395cef9396018760
  1. usr/
  2. OWNERS
  3. update.sh