Add the fet12 PCBs

These are the files as I sent them off to be made.

Change-Id: Icd3534fbd8c512670484bcfb6fa81b8cd9c45cf1
diff --git a/motors/packages/4_bolt_head.fp b/motors/packages/4_bolt_head.fp
new file mode 100644
index 0000000..295609e
--- /dev/null
+++ b/motors/packages/4_bolt_head.fp
@@ -0,0 +1,4 @@
+Element[0x0 "#4 bolt, just head" "" "" 0 0 0 0 0 100 0x0]
+(
+   Pin[0 0 0.185in 2000 0.193in 0.1285in "1" "1" 0x01]
+)