This change adds bindings for AttachVirtualDisk and GetVirtualDiskPhysicalPath, some helper functions including
one to create a differencing vhd, exports the create and open parameters, exports the create flags and adds a couple
of missing flags. This will be used mainly to go hand in hand with the new computestorage calls added to hcsshim as all of the
vhd creation and setup needs to be done manually for these calls. https://github.com/microsoft/hcsshim/pull/881.
Signed-off-by: Daniel Canter <dcanter@microsoft.com>
Adds the basic structs for VHD function calls and includes one simple wrapper for VHDX creation.
This includes the updated version of mksyscall_windows.go, which previously assumed any api that doesn't end in "W" must not be unicode, and encodes the strings incorrectly. This hard-codes for unicode support and generates the syscalls from there.