        * usb/libusb.c: added gp_port_usb_msg_interface_write_lib and           gp_port_usb_msg_interface_read_lib functions, and corresponding           entries in "ops" list, in order to support 0x41 and 0xc1 request           types needed by Sonix sn9c2028 cameras.
        * usb/libusb.c: added gp_port_usb_msg_interface_write_lib and
          gp_port_usb_msg_interface_read_lib functions, and corresponding
          entries in "ops" list, in order to support 0x41 and 0xc1 request
          types needed by Sonix sn9c2028 cameras.


git-svn-id: 40dd595c6684d839db675001a64203a1457e7319@8049 67ed7778-7388-44ab-90cf-0a291f65f57c

msmeissn/libgphoto2,thusoy/libgphoto2,msmeissn/libgphoto2,msmeissn/libgphoto2,msmeissn/libgphoto2,gphoto/libgphoto2,msmeissn/libgphoto2,thusoy/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2,jbreeden/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2,thusoy/libgphoto2,thusoy/libgphoto2,jbreeden/libgphoto2,gphoto/libgphoto2,thusoy/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2