Fixed error in 'How to build ICU'. Added missing stuff on how to rebuild the documentation.
Fixed error in 'How to build ICU'.
Added missing stuff on how to rebuild the documentation.


git-svn-id: 3ec853389310512053d525963cab269c063bb453@171920 13f79535-47bb-0310-9956-ffa450edef68

AaronNGray/xerces,AaronNGray/xerces,AaronNGray/xerces,AaronNGray/xerces