Add yosys:techlibs:ice40 0.7

Author: olofk

yosys_cells/ice40-0.7.core

@@ -0,0 +1,17 @@
+CAPI=2:
+
+name : yosys:techlibs:ice40:0.7
+
+filesets:
+  ice40_cells:
+    files:
+      - cells_sim.v : {file_type : verilogSource}
+
+targets:
+  default:
+    filesets : [ice40_cells]
+
+provider:
+  name     : url
+  filetype : simple
+  url      : https://raw.githubusercontent.com/YosysHQ/yosys/c3be94e967c904d4b7a0591fdaa2d86bc926ec41/techlibs/ice40/cells_sim.v