Workaround for 50nm scalegrid of gf180mcu

This should be changed into an additional magscale parameter in the
.tech file instead

lclayout/writer/magic_writer.py

@@ -126,6 +126,7 @@ def store_layout_to_magic_file(tech_name: str,
     mag_lines = ["magic",
                  "# Generated by librecell",
                  "tech {}".format(tech_name),
+                 "magscale 1 10" if tech_name=='gf180mcuC' else "magscale 1 1", 
                  "timestamp {}".format(int(time.time()))
                  ]