This patch fixes a compilation warning regarding btio/btio.c. Actually
this warning seems a false positive by Ubuntu Natty GCC version. A new
bug on Ubuntu bug system was opened but if you do not want to wait until
it is analyzed, just apply this minor fix.
btio/btio.c: In function 'bt_io_get':
btio/btio.c:803:11: warning: 'flushable' may be used uninitialized in
this function
This patch adds support for the BT_FLUSHABLE L2CAP socket option through
BtIO. This can be used to mark data from specific L2CAP sockets to have
the flushable flag set in their corresponding ACL packets.