Add hooks description in symmetry with tools/hook-scripts/.
Add hooks description in symmetry with tools/hook-scripts/.

* contrib/hook-scripts/README: New.



git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@853348 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion