Re-add building things depending on config.h by having it generate in the...

Re-add building things depending on config.h by having it generate in the source tree instead of the build tree, so that when cmake uses a non-source build dir (as it's supposed to) it can actually find the file.  I think this is messy, as AFAIK cmake shouldn't be modifying the contents of the source tree...any cmake gurus out there, feel free to let me know if there's a better way.


git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@937552 283d02a7-25f6-0310-bc7c-ecb5cbfe19da