sigrok-cross-android: Switch to libusbx for libusb-1.0
new-driver: Update for recent LOG_PREFIX changes.
sigrok-cross-android: Initial support for MIPS/x86 Android builds.
sigrok-cross-mingw: Get libusb0.dll from libusb-win32.

This is one half of the fix for bug #241.
README: Update, add missing items, drop uneeded ones.
sigrok-cross-mingw: Add an option for parallel compiles.

This currently defaults to "-j 2".
sigrok-cross-mingw: Add -DENABLE_COTIRE=y for faster PulseView builds.
sigrok-cross-mingw: README: Add some more requirements.

This also fixes bug #248.
sigrok-cross-mingw: Also ship zadig.exe and zadig_xp.exe.

This is a helper tool for installing libusb-win32 or WinUSB drivers on
Windows, which is a requirement for USB devices to be recognized by
libsigrok (libusb actually) on Windows.
sigrok-cross-mingw: Bring back accidentally dropped patch.