The aapt and aidl tools are prebuilt when we're doing an apps-only build, so don't try to build them.

Change-Id: I9896b11a9b90cbbbe2170243c8bdbc40231dfbff

Author: Joe Onorato

tools/aapt/Android.mk

@@ -4,6 +4,9 @@
 # Android Asset Packaging Tool
 #
 
+# This tool is prebuilt if we're doing an app-only build.
+ifeq ($(TARGET_BUILD_APPS),)
+
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
@@ -53,3 +56,4 @@ LOCAL_MODULE := aapt
 
 include $(BUILD_HOST_EXECUTABLE)
 
+endif # TARGET_BUILD_APPS

tools/aidl/Android.mk

@@ -2,6 +2,9 @@
 #
 # Copies files into the directory structure described by a manifest
 
+# This tool is prebuilt if we're doing an app-only build.
+ifeq ($(TARGET_BUILD_APPS),)
+
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
@@ -21,4 +24,4 @@ LOCAL_MODULE := aidl
 
 include $(BUILD_HOST_EXECUTABLE)
 
-
+endif # TARGET_BUILD_APPS