all: Revert libusb-1.0 support

Listing of usb devices with libusb-1.0 is too slow and not usable for
flashing or cold-flashing Nokia N900.

Old libusb (0.1) does not have this problem and works perfectly.

Problem for libusb-1.0 was reported at least two times into libusb-devel
mailing list, but upstream developers are totally ignore it. One message is
in archive: https://sourceforge.net/p/libusb/mailman/message/34985373/

Because of that there is just one option: use tested and working libusb 0.1
library instead some experimental and non-working libusb-1.0.

.travis.yml

@@ -4,7 +4,7 @@ compiler:
   - clang
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq -y libusb-1.0-0-dev
+  - sudo apt-get install -qq -y libusb-dev
 script: if [ "${COVERITY_SCAN_BRANCH}" != 1 ]; then make ; fi
 
 matrix: