Add all of the encoder board files we shipped

Change-Id: I679ca8e3291d258417e79b162e7d9711caf33414
diff --git a/motors/encoder_schematic/gafrc b/motors/encoder_schematic/gafrc
new file mode 100644
index 0000000..c1bfff0
--- /dev/null
+++ b/motors/encoder_schematic/gafrc
@@ -0,0 +1,2 @@
+(component-library "../symbols" "Custom Symbols")
+(source-library "..")