spiOverJtag: add bitstream for spartan6 LX16 FTG256

spiOverJtag/Makefile

@@ -1,4 +1,4 @@
-XILINX_PARTS := xc6slx45csg324 xc6slx100fgg484 \
+XILINX_PARTS := xc6slx16ftg256 xc6slx45csg324 xc6slx100fgg484 \
 	xc7a35tcpg236 xc7a35tcsg324 xc7a35tftg256 \
 	xc7a50tcpg236 xc7a75tfgg484 xc7a100tcsg324 xc7a100tfgg484 xc7a200tsbg484 \
 	xc7s25csga324 xc7s50csga324

spiOverJtag/build.py

@@ -47,6 +47,7 @@ else:
 
 if tool in ["ise", "vivado"]:
     pkg_name = {
+        "xc6slx16ftg256"   : "xc6s_ftg256",
         "xc6slx45csg324"   : "xc6s_csg324",
         "xc6slx100fgg484"  : "xc6s_fgg484",
         "xc7a35tcpg236"    : "xc7a_cpg236",
@@ -65,9 +66,11 @@ if tool in ["ise", "vivado"]:
         cst_type = "UCF"
         tool_options = {'family': family,
                         'device': {
+                            "xc6slx16ftg256": "xc6slx16",
                             "xc6slx45csg324": "xc6slx45",
                             "xc6slx100fgg484": "xc6slx100"}[part],
                         'package': {
+                            "xc6slx16ftg256": "ftg256",
                             "xc6slx45csg324": "csg324",
                             "xc6slx100fgg484": "fgg384"}[part],
                         'speed' : -3