Added reboot/shutdown OPKs for GMenu2X

Added Clock app as a package and updated the OPK icon
Updated README for Libretro cores and set default folder for the OPK

FunKey/package/clock/Config.in

@@ -0,0 +1,9 @@
+config BR2_PACKAGE_CLOCK
+	bool "clock"
+	default y
+	select BR2_PACKAGE_SDL
+	help
+	This is a simple app that sets the clock.
+
+
+	  https://github.com/gameblabla/clock_sdl_app

FunKey/package/clock/clock.mk

@@ -0,0 +1,33 @@
+################################################################################
+#
+# clock sdl app
+#
+################################################################################
+
+CLOCK_VERSION = v1.0-funkey-s
+CLOCK_SITE_METHOD = git
+CLOCK_SITE = https://github.com/DrUm78/clock_sdl_app.git
+CLOCK_LICENSE = GPL-2.1+
+CLOCK_LICENSE_FILES = LICENSE
+
+CLOCK_DEPENDENCIES = sdl
+
+define CLOCK_BUILD_CMDS
+	(cd $(@D); \
+	sed -i -e 's|/opt/FunKey-sdk/usr/bin/arm-funkey-linux-musleabihf-gcc|../../host/usr/bin/arm-linux-gcc|g' Makefile.funkey; \
+	make -f Makefile.funkey \
+	)
+endef
+
+define CLOCK_INSTALL_TARGET_CMDS
+	$(INSTALL) -d -m 0755 $(TARGET_DIR)/usr/bin
+	$(INSTALL) -m 0755 $(@D)/clock $(TARGET_DIR)/usr/bin/
+endef
+
+define CLOCK_CREATE_OPK
+	$(INSTALL) -d -m 0755 $(TARGET_DIR)/usr/local/share/OPKs/Settings
+	$(HOST_DIR)/usr/bin/mksquashfs $(CLOCK_PKGDIR)/opk $(TARGET_DIR)/usr/local/share/OPKs/Settings/clock_funkey-s.opk -all-root -noappend -no-exports -no-xattrs
+endef
+CLOCK_POST_INSTALL_TARGET_HOOKS += CLOCK_CREATE_OPK
+
+$(eval $(generic-package))

FunKey/package/clock/opk/clock.funkey-s.desktop

@@ -0,0 +1,6 @@
+[Desktop Entry]
+Name=Clock
+Comment=Set time and date
+Exec=/usr/bin/clock
+Icon=clock
+Categories=settings

FunKey/package/picoarch/opk/picoarch.funkey-s.desktop

@@ -4,4 +4,5 @@ Comment=SDL Libretro frontend
 Exec=/usr/games/picoarch %f
 Icon=picoarch
 Categories=games
+SelectorDir=/mnt/Libretro/cores
 SelectorFilter=so