Add BOARD_HAS_JANKY_BACKBUFFER for terrible Galaxy Tabs.

Change-Id: I72e7a8aaf65c97d4cd2b77ff92cf7232f8c9e7a7
diff --git a/minui/Android.mk b/minui/Android.mk
index 10f0f3f..d71cea2 100644
--- a/minui/Android.mk
+++ b/minui/Android.mk
@@ -11,6 +11,10 @@
     LOCAL_CFLAGS += -DBOARD_LDPI_RECOVERY='"$(BOARD_LDPI_RECOVERY)"'
 endif
 
+ifneq ($(BOARD_HAS_JANKY_BACKBUFFER),)
+    LOCAL_CFLAGS += -DBOARD_HAS_JANKY_BACKBUFFER
+endif
+
 LOCAL_MODULE := libminui
 
 include $(BUILD_STATIC_LIBRARY)