Add ./configure --libdevdir= for development package files
The development package files (--libdevdir=) have been separated from
the library runtime package files (--libdir=). Make sure to set
--libdevdir= so x86_64 Fedora RPMs are built for /usr/lib64 instead of
/usr/lib.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>