Bugfix: bitforce: Retry ZGX until device is NOT busy
Bugfix: bitforce: Close opened fd if reinit fails
opencl: Include OpenCL platform in kernel binary filenames
Merge commit 'b150810' into bfgminer-2.10.x

Conflicts:
	driver-bitforce.c
Merge commit '8534c62' into bfgminer-2.10.x
Merge commit '16dacbc' into bfgminer-2.10.x
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