adding bs fsig test

kat_test/random/bs_fsig.kat

+l i1 1 0 n0
+s s0 1 n0 n1
+
+l i2 2 0 n6
+s s1 1 n6 n3
+
+bs bs1 0.6 0.4 45 10 n1 n2 n3 n4
+
+l i3 3 0 n5
+s s2 1 n2 n5
+
+l i4 4 0 n7
+s s3 1 n4 n7
+
+ad car_n5 0 n5
+ad car_n7 0 n7
+
+ad usb_n5 10 n5
+ad usb_n7 10 n7
+
+ad lsb_n5 -10 n5
+ad lsb_n7 -10 n7
+
+ad car_n0 0 n0
+ad car_n6 0 n6
+
+ad usb_n0 10 n0
+ad usb_n6 10 n6
+
+ad lsb_n0 -10 n0
+ad lsb_n6 -10 n6
+
+fsig sig1 bs1 10 0
+
+noxaxis
+
+printmatrix