Use Linux BLKGETSIZE64 to determine the size of a block device

Without this we assume the size of the device is 0.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Regenerate OASIS

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
BLKGETSIZE64: fix up C bindings

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Update to 0.6.1

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #10 from djs55/get_file_size

Use BLKGETSIZE64 to find the size of block devices on Linux