Because we have `set -e` configured if the shell script fails
on a command that doesn't print out any details we may be lost
as to when / where failure occurs, set -x so that we can trace
where the script ended.
Change-Id: Ied07ca2c9fbd45b7e770688ca61f30231586b216 Signed-off-by: Thanh Ha <zxiiro@gmail.com>