scripts: unset GREP_OPTIONS in env and feeds (fixes #16924)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 41407

scripts/env

 #!/usr/bin/env bash
 BASEDIR="$PWD"
 ENVDIR="$PWD/env"
+export GREP_OPTIONS=
 
 usage() {
 	cat <<EOF

scripts/feeds

@@ -11,6 +11,7 @@ use Cwd 'abs_path';
 chdir "$FindBin::Bin/..";
 $ENV{TOPDIR}=getcwd();
 $ENV{GIT_CONFIG_PARAMETERS}="'core.autocrlf=false'";
+$ENV{GREP_OPTIONS}="";
 
 my $mk=`which gmake 2>/dev/null`;	# select the right 'make' program
 chomp($mk);		# trim trailing newline