Fix the location that reviewboard.db is stored in when running prepare-dev.
Fix the location that reviewboard.db is stored in when running prepare-dev.

prepare-dev called into rb-site's sync_database, which changed to the
'reviewboard' directory before running syncdb. This meant that the
initial database would appear in the wrong place. Now we explicitly
force it to be the correct directory before calling syncdb.

Khan/reviewboard,atagar/ReviewBoard,brennie/reviewboard,davidt/reviewboard,davidt/reviewboard,atagar/ReviewBoard,davidt/reviewboard,1tush/reviewboard,beol/reviewboard,chipx86/reviewboard,Khan/reviewboard,1tush/reviewboard,bkochendorfer/reviewboard,beol/reviewboard,1tush/reviewboard,sgallagher/reviewboard,1tush/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard,atagar/ReviewBoard,davidt/reviewboard,1tush/reviewboard,bkochendorfer/reviewboard,reviewboard/reviewboard,beol/reviewboard,1tush/reviewboard,Khan/reviewboard,custode/reviewboard,atagar/ReviewBoard,brennie/reviewboard,brennie/reviewboard,Khan/reviewboard,Khan/reviewboard,atagar/ReviewBoard,1tush/reviewboard,chipx86/reviewboard,bkochendorfer/reviewboard,KnowNo/reviewboard,bkochendorfer/reviewboard,reviewboard/reviewboard,KnowNo/reviewboard,chipx86/reviewboard,beol/reviewboard,sgallagher/reviewboard,Khan/reviewboard,Khan/reviewboard,atagar/ReviewBoard,atagar/ReviewBoard,1tush/reviewboard,sgallagher/reviewboard,chipx86/reviewboard,Khan/reviewboard,1tush/reviewboard,Khan/reviewboard,custode/reviewboard,custode/reviewboard,KnowNo/reviewboard,brennie/reviewboard,custode/reviewboard,atagar/ReviewBoard,atagar/ReviewBoard,KnowNo/reviewboard,sgallagher/reviewboard