Revert "Move frameworks/base/tools/ to frameworks/tools/"

This reverts commit 9f6a119c8aa276432ece4fe2118bd8a3c9b1067e.
diff --git a/tools/aidl/Android.mk b/tools/aidl/Android.mk
new file mode 100644
index 0000000..77d46ab
--- /dev/null
+++ b/tools/aidl/Android.mk
@@ -0,0 +1,29 @@
+# Copyright 2007 The Android Open Source Project
+#
+# 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)
+
+LOCAL_SRC_FILES := \
+	aidl_language_l.l \
+	aidl_language_y.y \
+	aidl.cpp \
+	aidl_language.cpp \
+	options.cpp \
+	search_path.cpp \
+	AST.cpp \
+	Type.cpp \
+	generate_java.cpp \
+	generate_java_binder.cpp \
+	generate_java_rpc.cpp
+
+LOCAL_CFLAGS := -g
+LOCAL_MODULE := aidl
+
+include $(BUILD_HOST_EXECUTABLE)
+
+endif # TARGET_BUILD_APPS