Fix OpenWRT release info

include/toplevel.mk

@@ -12,7 +12,7 @@ PREP_MK= OPENWRT_BUILD= QUIET=0
 
 -include $(TOPDIR)/include/verbose.mk
 
-REVISION:=$(shell $(TOPDIR)/scripts/getver.sh 2>/dev/null)
+REVISION:=$(shell cd $(TOPDIR) && ./scripts/getver.sh 2>/dev/null)
 
 HOSTCC ?= gcc
 OPENWRTVERSION:=$(RELEASE)$(if $(REVISION), ($(REVISION)))