To avoid a conflict with usbhid.h, our libhidapi renames hid_init.

Index: src/device/device_io_hid.cpp
--- src/device/device_io_hid.cpp.orig
+++ src/device/device_io_hid.cpp
@@ -92,7 +92,7 @@ namespace hw {
  
     void device_io_hid::init() {
       int r;
-      r = hid_init();
+      r = hidapi_hid_init();
       ASSERT_X(r>=0, "Unable to init hidapi library. Error "+std::to_string(r)+": "+safe_hid_error(this->usb_device));
     }
 
