.travis.yml: install libusb1.0 lib devel

before:
<code>
checking libusb-1.0/libusb.h usability... no
checking libusb-1.0/libusb.h presence... no
checking for libusb-1.0/libusb.h... no
configure: canusb sniffing is not supported; install libusb1.0 lib devel to enable it
</code>
after:
<code>
checking libusb-1.0/libusb.h usability... yes
checking libusb-1.0/libusb.h presence... yes
checking for libusb-1.0/libusb.h... yes
configure: canusb sniffing is supported
</code>