fix for GREP_OPTIONS

When using GREP_OPTIONS to supply default options to grep, the buildsystem might get broken (For example adding --color=always breaks it)
This patch will empty the GREP_OPTIONS to prevent the described (and any other) problems related to GREP_OPTIONS

Signed-off-by: Maarten Bezemer <m.m.bezemer@utwente.nl>

SVN-Revision: 22443

Makefile

@@ -24,6 +24,8 @@ ifneq ($(OPENWRT_BUILD),1)
 
   override OPENWRT_BUILD=1
   export OPENWRT_BUILD
+  GREP_OPTIONS=
+  export GREP_OPTIONS
   include $(TOPDIR)/include/debug.mk
   include $(TOPDIR)/include/depends.mk
   include $(TOPDIR)/include/toplevel.mk

rules.mk

@@ -18,6 +18,9 @@ TMP_DIR:=$(TOPDIR)/tmp
 
 export SHELL=/usr/bin/env bash -c '. $(TOPDIR)/include/shell.sh; eval "$$2"' --
 
+GREP_OPTIONS=
+export GREP_OPTIONS
+
 qstrip=$(strip $(subst ",,$(1)))
 #"))