[threeten-dev] Updated Hijrah Data

[roger riggs]

Hi,

Thanks to the contribution of Dr. Fayez Alhargan of KACST, accurate and 
complete data
for the Umm Al-Qura Islamic calendar is available and is being added to 
OpenJDK.
The tests have been updated and minor javadoc corrections are included.

The webrev is:
    http://cr.openjdk.java.net/~rriggs/webrev-hijrah-data/

Please review and comment.

Thanks, Roger