SDC: Add -through pin case for set_false_path command test

Signed-off-by: Tomasz Michalak <tmichalak@antmicro.com>

sdc-plugin/tests/set_false_path/set_false_path.golden.sdc

diff --git a/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc b/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc
index 4e75de4..b90bd9b 100644
--- a/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc
+++ b/sdc-plugin/tests/set_false_path/set_false_path.golden.sdc
@@ -1,3 +1,4 @@
 set_false_path -to inter_wire
 set_false_path -from clk
 set_false_path -from clk -to bottom_inst.I
+set_false_path -through bottom_inst.I

sdc-plugin/tests/set_false_path/set_false_path.tcl

diff --git a/sdc-plugin/tests/set_false_path/set_false_path.tcl b/sdc-plugin/tests/set_false_path/set_false_path.tcl
index a4e01f4..ae14469 100644
--- a/sdc-plugin/tests/set_false_path/set_false_path.tcl
+++ b/sdc-plugin/tests/set_false_path/set_false_path.tcl
@@ -16,4 +16,7 @@
 # -from clk to bottom_inst/I
 set_false_path -from clk -to bottom_inst.I
 
+# -through bottom_inst/I
+set_false_path -through bottom_inst.I
+
 write_sdc $::env(DESIGN_TOP).sdc