Clean up Mac OS hacks in acp slightly.

Change-Id: I7cba3a345cd8907ae050961cc4f173003ac90f39
diff --git a/libs/host/Android.mk b/libs/host/Android.mk
index 8a28457..bc25e4b 100644
--- a/libs/host/Android.mk
+++ b/libs/host/Android.mk
@@ -5,11 +5,11 @@
     CopyFile.c
 
 LOCAL_CFLAGS := -Werror -Wall
-LOCAL_CFLAGS_darwin += -DMACOSX_RSRC
 
 LOCAL_MODULE:= libhost
 LOCAL_MODULE_HOST_OS := darwin linux windows
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
 LOCAL_CXX_STL := none
 
 # acp uses libhost, so we can't use