libusb: Rebuild for systemd/udev update

```
$ ldd /usr/lib/libusb-1.0.so
        linux-vdso.so.1 (0x00007ffe22b5c000)
        libudev.so.0 => not found
        libpthread.so.0 => /lib/libpthread.so.0 (0x00007ff7378e6000)
        libc.so.6 => /lib/libc.so.6 (0x00007ff73753a000)
        /lib64/ld-linux-x86-64.so.2 (0x000056413bd22000)
```

Building UPower gives the warning below.

```
  CCLD   upowerd
/usr/bin/ld: warning: libudev.so.0, needed by /usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../lib64/libusb-1.0.so, not found (try using -rpath or -rpath-link)
```

Increment the version number by two, as there is already a higher
revision, which has never been installed on the distmaster though.

libusb.be0

@@ -1,6 +1,6 @@
 #!/bin/env beesh
 
-# BEE_VERSION libusb-1.0.19-0
+# BEE_VERSION libusb-1.0.19-2
 
 PGRP=( uncategorized )