When creating a CL semaphore object from a Vulkan semaphore one, we
explicitly pass `-1` as the file descriptor value in the case of
`VULKAN_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD`. According to the CL
specification:
> The special value -1 for fd is treated like a valid sync file
> descriptor referring to an object that has already signaled. The
> import operation will succeed and the semaphore will have a
> temporarily imported payload as if a valid file descriptor had
> been provided.
The test currently checks that the semaphore payload is unsignalled,
unconditionally, which is incorrect.
Changed the test to check for the correct expected payload value.
Signed-off-by: Ahmed Hesham <ahmed.hesham@arm.com>
10130a1261