Use correct $bp global variables in BP_Core::bootstrap() when updating from a pre-1.5 version. Fixes #4935.

git-svn-id: https://buddypress.svn.wordpress.org/trunk@6910 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Use filtered $bp global variables in BP_Core::bootstrap() for deactivated components array. See #4935.

git-svn-id: https://buddypress.svn.wordpress.org/trunk@6911 cdf35c40-ae34-48e0-9cc9-0c9da1808c22