Show the "platform tools" version in adb/fastboot --version.

Annoyingly folks parse the "adb --version" output so we have the
less-interesting protocol version first. But at least now we'll
have the "real" version somewhere...

Bug: N/A
Test: "adb --version"/"fastboot --version"
Change-Id: Ia85b561bd8d84c6fd6995923730d36f53b2f800b
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index e675d7d..4d54175 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -14,8 +14,12 @@
 
 LOCAL_PATH:= $(call my-dir)
 
+include $(LOCAL_PATH)/../platform_tools_tool_version.mk
+
 include $(CLEAR_VARS)
 
+LOCAL_CFLAGS += -DFASTBOOT_VERSION=\"$(tool_version)\"
+
 LOCAL_C_INCLUDES := \
   $(LOCAL_PATH)/../adb \
   $(LOCAL_PATH)/../mkbootimg \
@@ -37,8 +41,6 @@
 LOCAL_MODULE_HOST_OS := darwin linux windows
 LOCAL_CFLAGS += -Wall -Wextra -Werror -Wunreachable-code
 
-LOCAL_CFLAGS += -DFASTBOOT_REVISION=\"$(BUILD_NUMBER_FROM_FILE)\"
-
 LOCAL_SRC_FILES_linux := usb_linux.cpp
 LOCAL_STATIC_LIBRARIES_linux := libselinux