Specify libicu explicitly in Aptfile (#4920)

It seems libicu-dev no longer installs libicu55 needed by charlock_holmes.
2017-09-12 21:30:13 -10:00 · 2017-09-12 21:30:13 -10:00 · 081f907f90
--- a/1
+++ b/1
@ -1,4 +1,5 @@
 ffmpeg
+libicu[0-9][0-9]
 libicu-dev
 libidn11
 libidn11-dev