barebox: Add a git revision to the recipe as well

Make sure that the source version changes so new code is being
fetched. This should fix the build breakaage for the ODU build.

recipes-sysmobts/barebox/barebox.inc

@@ -9,6 +9,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=057bf9e50e1ca857d0eb97bfe4ba8e5d"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 
+PV = "201407+git${SRCPV}"
+
 inherit kernel-arch
 
 EXTRA_OEMAKE = "CROSS_COMPILE=${TARGET_PREFIX}"