File openobex-libusb-check.patch of Package openobex

http://dev.zuckschwerdt.org/openobex/ticket/2
================================================================================
--- acinclude.m4
+++ acinclude.m4
@@ -202,7 +202,7 @@
 
 	if (test "${usb_enable}" = "yes" && test "${usb_found}" = "yes"); then
 		AC_DEFINE(HAVE_USB, 1, [Define if system supports USB and it's enabled])
-		AC_CHECK_FILE(${prefix}/lib/pkgconfig/libusb.pc, REQUIRES="libusb")
+		PKG_CHECK_EXISTS(libusb, [REQUIRES="libusb"])
 	fi
 
 	AM_CONDITIONAL(GLIB, test "${glib_enable}" = "yes" && test "${glib_found}" = "yes")