0.5.2
vendor._gowin: fix clock name quotes for Gowin IDE
Gowin IDE seems unhappy with quotes in clock signal names. For instance,
with the following SDC:
create_clock -name "clk50_0__io" -period 20.0 [get_ports
{clk50_0__io}]
Gowin IDE will complain with the following error message:
ERROR (TA2000) : "top.sdc":2 | 'syntax error' near token '-period'
Changing quotes with curly braces fixes the issue.