new: arty: fix for pin conflict

Pin V17 was assigned to two different non-exclusive interfaces. This causes the tools to fail if both interfaces are used in a design. This was introduced when we changed the SPI interface to use IO10 for the SS pin to increase shield compatibility. Unfortunately this created a conflict with the GPIO interface connected to IO0-IO19. To fix the conflict I assigned the GPIO pin to the location attached to the SS pin on the SPI connector. I will create an issue to find a better fix for this.

new/board_files/arty/C.0/part0_pins.xml

@@ -65,7 +65,7 @@
   <pin index="61" name ="shield_dp0_dp19_tri_i_7" iostandard="LVCMOS33" loc="T16"/>
   <pin index="62" name ="shield_dp0_dp19_tri_i_8" iostandard="LVCMOS33" loc="N15"/>
   <pin index="63" name ="shield_dp0_dp19_tri_i_9" iostandard="LVCMOS33" loc="M16"/>
-  <pin index="64" name ="shield_dp0_dp19_tri_i_10" iostandard="LVCMOS33" loc="V17"/>
+  <pin index="64" name ="shield_dp0_dp19_tri_i_10" iostandard="LVCMOS33" loc="C1"/>
   <pin index="65" name ="shield_dp0_dp19_tri_i_11" iostandard="LVCMOS33" loc="U18"/>
   <pin index="66" name ="shield_dp0_dp19_tri_i_12" iostandard="LVCMOS33" loc="R17"/>
   <pin index="67" name ="shield_dp0_dp19_tri_i_13" iostandard="LVCMOS33" loc="P17"/>