Rebuild icudt51l.dat file?
Another solution for this is to boot into your recovery partition with CMD+R while your machine is booting. From there you can open the Terminal from Utilities in the menu bar. Then you can copy the file with:

cp /usr/share/icu/icudt51l.dat /Volumes/YOUR_DRIVE/usr/share/icu


If your drive has FileVault enabled you may have to unlock that through disk utility first.