Add the fet12 PCBs

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

Change-Id: Icd3534fbd8c512670484bcfb6fa81b8cd9c45cf1
diff --git a/motors/packages/0522071433.fp b/motors/packages/0522071433.fp
index 8f5c9c3..5b14597 100644
--- a/motors/packages/0522071433.fp
+++ b/motors/packages/0522071433.fp
@@ -1,5 +1,6 @@
 # This is the footprint at
 # http://www.molex.com/pdm_docs/sd/152670201_sd.pdf.
+# Also works for 0522711479 (bottom contact version).
 Element[0x0 "" "" "" 0 0 0 0 0 100 0x0]
 (
 	Pad[-6.5mm 0.65mm -6.5mm -0.65mm 0.6mm 2000 0.75mm "1" "1" "square"]