Android.mk: Disable tools that do not build for android

Disable the tools / demo code that do not currently build
for android until they can be fixed.

Affected tools / demos
intel_display_crc
intel_sprite_on

v2: intel_display_crc compiled conditionally on ANDROID_HAS_CAIRO
flag.
v3: removed intel_reg from the skip list as Thomas has prepared
a patch to fix it for Android.

Signed-off-by: Derek Morton <derek.j.morton@intel.com>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>
diff --git a/tools/Android.mk b/tools/Android.mk
index fbba579..6617f28 100644
--- a/tools/Android.mk
+++ b/tools/Android.mk
@@ -45,6 +45,10 @@
     intel_vga_read \
     intel_vga_write
 
+ifneq ("${ANDROID_HAS_CAIRO}", "1")
+    skip_tools_list += intel_display_crc
+endif
+
 tools_list := $(filter-out $(skip_tools_list),$(bin_PROGRAMS))
 
 $(foreach item,$(tools_list),$(eval $(call add_tool,$(item))))