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

This reverts commit 9f6a119c8aa276432ece4fe2118bd8a3c9b1067e.
diff --git a/tools/validatekeymaps/Android.mk b/tools/validatekeymaps/Android.mk
new file mode 100644
index 0000000..9af721d
--- /dev/null
+++ b/tools/validatekeymaps/Android.mk
@@ -0,0 +1,33 @@
+#
+# Copyright 2010 The Android Open Source Project
+#
+# Keymap validation tool.
+#
+
+# This tool is prebuilt if we're doing an app-only build.
+ifeq ($(TARGET_BUILD_APPS),)
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+	Main.cpp
+
+LOCAL_CFLAGS := -Wall -Werror
+
+LOCAL_STATIC_LIBRARIES := \
+	libinput \
+	libutils \
+	libcutils \
+	liblog
+
+ifeq ($(HOST_OS),linux)
+LOCAL_LDLIBS += -ldl -lpthread
+endif
+
+LOCAL_MODULE := validatekeymaps
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_HOST_EXECUTABLE)
+
+endif # TARGET_BUILD_APPS