Added an import script for importing standard cell GDS that removes
the "flatten" option, which will cause the fill cells to get
flattened out of existence.
diff --git a/gf180mcu/Makefile.in b/gf180mcu/Makefile.in
index e0f192e..ef4efdf 100644
--- a/gf180mcu/Makefile.in
+++ b/gf180mcu/Makefile.in
@@ -822,6 +822,7 @@
                         header=liberty/gf180mcu_fd_sc_mcu9t5v0__tt_025C_5v00.lib \
 			rename=gf180mcu_fd_sc_mcu9t5v0__tt_025C_5v00 \
 		-gds cells/*/*.gds compile-only \
+			options=custom/scripts/gds_import_sc.tcl \
 			filter=custom/scripts/fix_stdcell_gds.py \
 		-lef cells/*/*.lef compile-only \
 			filter=custom/scripts/fix_digital_lef.py \
@@ -902,6 +903,7 @@
 			header=liberty/gf180mcu_fd_sc_mcu7t5v0__tt_025C_5v00.lib \
 			rename=gf180mcu_fd_sc_mcu7t5v0__tt_025C_5v00 \
 		-gds cells/*/*.gds compile-only \
+			options=custom/scripts/gds_import_sc.tcl \
 			filter=custom/scripts/fix_stdcell_gds.py \
 		-lef cells/*/*.lef compile-only \
 			filter=custom/scripts/fix_digital_lef.py \