Update tests and example to use the new libusb_init_context() function This commit updates all test and example code to use the newer libusb_init_context() function instead of libusb_init(). Signed-off-by: Nathan Hjelm <hjelmn@google.com> [Tormod: Update umockdev.c as well] Signed-off-by: Tormod Volden <debian.tormod@gmail.com>