ar71xx: Add Gainstrong MiniBox v1.0 support to trunk

This patch supersedes the v1 from September 17th.

Bumping the patch version - the MiniBox profile showed up under M, but
since it's called 'Gainstrong MiniBox v1.0' now it looks out of place.
Renamed the profile to gs-minibox-v1.mk to fix that.

The following patch adds support for the Gainstrong MiniBox into trunk
(or 'Designated Driver' :D ).

Fixed items:

- Inverted LED polarity (OOLITE seems to suffer from the same problem).
- Changed uppercase MINIBOX_V1_ prefix as requested.
- Prefixes are now gs_minibox_ similar to gs_oolite_ (same vendor).
- Mention the vendor (Gainstrong) in code headers.

Compiles fine, has been confirmed working by owners on 15.05.

Question: I've seen some boards use tools/firmware-utils/src/mktplinkfw.c,
the MiniBox images build fine without, so I'm wondering: do I need to add
it in there as well? Any added benefit?

Thank you

Signed-off by: Stijn Segers <francesco.borromini@inventati.org>

SVN-Revision: 47234

target/linux/ar71xx/generic/profiles/gs-minibox-v1.mk

@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2015 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+define Profile/MINIBOXV1
+	NAME:=Gainstrong MiniBox V1.0
+	PACKAGES:=kmod-usb-core kmod-usb2  kmod-ledtrig-usbdev
+endef
+
+
+define Profile/MINIBOXV1/Description
+	Package set optimized for the Gainstrong MiniBox V1.0
+endef
+$(eval $(call Profile,MINIBOXV1))