Clean up Mac OS hacks in acp slightly.

Change-Id: I7cba3a345cd8907ae050961cc4f173003ac90f39
diff --git a/tools/acp/Android.mk b/tools/acp/Android.mk
index e31ad3a..eec9c9d 100644
--- a/tools/acp/Android.mk
+++ b/tools/acp/Android.mk
@@ -3,20 +3,13 @@
 # Custom version of cp.
 
 LOCAL_PATH:= $(call my-dir)
+
 include $(CLEAR_VARS)
-LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
 
 LOCAL_SRC_FILES := \
     acp.c
 
-ifeq ($(HOST_OS),darwin)
-LOCAL_CFLAGS += -DMACOSX_RSRC
-endif
-ifeq ($(HOST_OS),linux)
-endif
-
 LOCAL_STATIC_LIBRARIES := libhost
-LOCAL_C_INCLUDES := build/libs/host/include
 LOCAL_MODULE := acp
 LOCAL_ACP_UNAVAILABLE := true
 LOCAL_CXX_STL := none