Allow --scantime alias to --scan-time
Bugfix: Skip yasm check when building for non-x86 platforms

Otherwise, we try to use x86_32 asm!
Bugfix: Fix configure big endian detection
Bugfix: GBT: work->data is always little-endian, but libblkmaker wants the nonce in native-endian
Merge commit 'e26691c' into bfgminer-2.9.x

Conflicts:
	main.c
Merge commit '83590b2' into bfgminer-2.9.x
Merge commit '6e2b243' into bfgminer-2.9.x
Merge commit 'a5b3824' into bfgminer-2.9.x

Conflicts:
	miner.c