this header is used in numerous files and adding to config.h
simplifies its use globally.

Change-Id: Id724a9950b90504721233022c7fb5768e9bc5548
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/649
Tested-by: jenkins
Reviewed-by: Xiaofan <xiaofanc@gmail.com>

Change-Id: I99c08ec0132d5a15250050e718310f1ddd9fe546
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/425
Tested-by: jenkins

This fixes issues with the folliwing patch under cygwin/mingw builds.
http://openocd.zylin.com/236

Change-Id: I7dd0b2d09cc64568bc99b16aa32e791a8273c5db
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/240
Tested-by: jenkins
Reviewed-by: Mathias Küster <kesmtp@freenet.de>
Reviewed-by: Mauro Gamba <maurillo71@gmail.com>

The configuration script check for libusb-1.0 availability first and only
if not found check for libusb-0. So if both libraries are installed on the
system the build script will use libusb-1.0
It's possible to force compiling with libusb-0 with the --enable-libusb0 switch.
If the driver support only libusb0 the script check anly for it.

Change-Id: I7eb045d4e2bd553abefad53f3f4023ff46b0f5f6
Signed-off-by: Mauro Gamba <maurillo71@gmail.com>
Reviewed-on: http://openocd.zylin.com/33
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>