Merge https://github.com/cliffordwolf/yosys
authordh73 <dh73_fpga@qq.com>
Thu, 9 Nov 2017 02:24:01 +0000 (20:24 -0600)
committerdh73 <dh73_fpga@qq.com>
Thu, 9 Nov 2017 02:24:01 +0000 (20:24 -0600)

Trivial merge