fix broken .pkginfo under certain situations

git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4122 3c298f89-4303-0410-b956-a3cf2f4a3e73

include/verbose.mk

@@ -32,4 +32,6 @@ ifneq ($(KBUILD_VERBOSE),99)
   endif
 
   .SILENT: $(MAKECMDGOALS)
+else
+   NO_TRACE_MAKE:=$(MAKE)
 endif