add heroC vendor
diff --git a/prebuilt/heroc/etc/gps.conf b/prebuilt/heroc/etc/gps.conf
new file mode 100644
index 0000000..f371e67
--- /dev/null
+++ b/prebuilt/heroc/etc/gps.conf
@@ -0,0 +1,5 @@
+NTP_SERVER=north-america.pool.ntp.org
+XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
+XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
+XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
+QOS_ACCURACY=16