added xrick game

original xrick code by 'BigOrno' at:
http://www.bigorno.net/xrick/

Rockbox port, plus bugfixes at:
https://github.com/pierluigi-vicinanza/xrick

Further changes:

 * Additonal fixes from g#3026
 * Port to modern plugin API
 * Add Pluginlib keymap fallback
 * Support all >1bpp screens
 * Fix build warnings in miniz
 * Better error message when resources are missing

Change-Id: Id83928bc2539901b0221692f65cbca41389c58e7

apps/plugins/xrick/xrick.make

@@ -0,0 +1,31 @@
+#             __________               __   ___.
+#   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+#   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+#   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+#   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+#                     \/            \/     \/    \/            \/
+# $Id$
+#
+
+XRICKSRCDIR := $(APPSDIR)/plugins/xrick
+XRICKBUILDDIR := $(BUILDDIR)/apps/plugins/xrick
+
+INCLUDES += -I$(XRICKSRCDIR)../ \
+            -I$(XRICKSRCDIR)/3rd_party
+
+ROCKS += $(XRICKBUILDDIR)/xrick.rock
+
+XRICK_SRC := $(call preprocess, $(XRICKSRCDIR)/SOURCES)
+XRICK_OBJ := $(call c2obj, $(XRICK_SRC))
+
+# add source files to OTHER_SRC to get automatic dependencies
+OTHER_SRC += $(XRICK_SRC)
+
+XRICKCFLAGS = $(PLUGINFLAGS) -std=gnu99 -O2
+
+$(XRICKBUILDDIR)/xrick.rock: $(XRICK_OBJ)
+
+# new rule needed to use extra compile flags
+$(XRICKBUILDDIR)/%.o: $(XRICKSRCDIR)/%.c
+	$(SILENT)mkdir -p $(dir $@)
+	$(call PRINTS,CC $(subst $(ROOTDIR)/,,$<))$(CC) $(XRICKCFLAGS) -c $< -o $@