Consolidated hana test benches into fewer files

for pf in test_simulation_{always,and,buffer,decoder,inc,mux,nand,nor,or,seq,shifter,sop,techmap,xnor,xor}; do
gawk 'FNR == 1 { printf("\n// %s\n",FILENAME); } { gsub("^module *", sprintf("module f%d_",ARGIND)); print; }' \
    ${pf}_*_test.v > $pf.v; ../tools/autotest.sh $pf.v; mv -v ${pf}_*_test.v Attic/; done;

..etc..

tests/hana/test_simulation_buffer.v

@@ -0,0 +1,17 @@
+
+// test_simulation_buffer_1_test.v
+module f1_test(input in, output out);
+assign out = in;
+endmodule
+
+// test_simulation_buffer_2_test.v
+module f2_test(input [1:0] in, output [1:0] out);
+assign out[0] = in[0];
+assign out[1] = in[1];
+endmodule
+
+// test_simulation_buffer_3_test.v
+module f3_test(input in, output [1:0] out);
+assign out[0] = in;
+assign out[1] = in;
+endmodule