Update aspirational_scripts per Unicode 9

This is a preparation to update ICU to 58.1.
Without this change, ICU update CL cannot be tested on
trybots because a compile will fail due to '#error' checking
if ICU version is less than 58.

BUG=637001
TEST=None
TBR=pkasting@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2436113003
Cr-Commit-Position: refs/heads/master@{#426749}
1 file changed