compile_pkgs: do not warn about white spaces in patches

This is not clean patching and we do not pretend it is so just ignore
those warnings.

compile_pkgs

@@ -354,7 +354,7 @@ available_commands+=( ["patch_openwrt"]="Patch the main OpenWRT repository" )
 patch_openwrt() {
 	_report "Patching OpenWRT repository"
 	for patch in "$src_dir/patches/openwrt"/*/*.patch; do
-		_git am --reject "$patch"
+		_git am --whitespace=nowarn --reject "$patch"
 	done
 	if [ -d "$src_dir/patches/openwrt"/*/"$TARGET_BOARD" ]; then
 		for patch in "$src_dir/patches/openwrt"/*/"$TARGET_BOARD"/*.patch; do
@@ -418,7 +418,7 @@ repatch_feeds() {
 		for patch in "$feed"/*/*.patch; do
 			[ -f "$patch" ] || continue
 			pushd "$build_dir/feeds/$feed_name" >/dev/null
-			_git am --reject "$patch"
+			_git am --whitespace=nowarn --reject "$patch"
 			popd >/dev/null
 		done
 		[ -d "$feed"/*/"$TARGET_BOARD" ] || continue